Showing posts with label cg modeler. Show all posts
Showing posts with label cg modeler. Show all posts

Tuesday, September 04, 2012

Visual Effects Positions


There are no standards for visual effects titles and positions. The VES has a long list of titles (available in the VES Handbook and on their website) but have no definitions currently.

I'll be listing some of the default practices but these will vary with companies and locations. Depending on the company structure and size they may be combining some of these roles and some may split them even finer.

The titles as laid out here are for feature film visual effects. Most apply to television and commercials as well. Animation companies tend to use some of these titles a bit differently. These also overlap the game industry as well although they will have somewhat different needs and titles.

There are a number of support people who are not unique to visual effects such as the IT department, mail department and other areas which exist at visual effects companies but I won’t be listing them here.

Before becoming too enamored with visual effects as a career please see this post regarding a career in visual effects.

A few general guidelines:
Some of these titles may have Junior or Senior designations added. Junior (i.e. Junior compositor) tends to imply someone still gaining experience in their area and senior tends to describe someone with experience who may be over seeing many others.

Associate is another term used to indicate involvement in the role but not necessarily the lead. Associate producer, associate supervisor, etc.

Assistant can apply to some of the titles as well.

The term 'Lead' is usually designated as someone who is overseeing a team of people involved in a specific aspect. Examples:  Lead Animator for the Horse Chase Sequence, Lead modeler for the Rocs, etc.  In the credits the specifics are usually dropped and just the Lead designation remains.

Supervisor is appended to some positions to designate supervision of that specific area and management of a crew or team of people. CG Supervisor, Composite Supervisor, etc. There are also Sequence Supervisors which relates to the Lead designation at some companies.

Generalist - Term sometimes used for visual effects person who covers a wide range of visual effects. Knowledgeable and experienced with different positions. Able to fill in for a number of positions as need be. This may also mean that the level of experience and talent isn’t as deep in a specific area. All depends on the usage.

Digital Artist or Digital Effects Artist – These are fairly generic titles and could mean anything. Sometimes used when companies want to clump a number of people together in credits or avoid conflicts.

There can be very defined departments with department managers. In a small company the department manager may also be a lead, hands on worker or supervisor. At some larger companies the department manager may strictly be a manager of their department and overseeing the general aspects of the artists in the department.

Some of the same positions may be filled in different departments. Example: Production Assistant for production, Production Assistant for motion capture, etc.

There can be many more positions than these (in many cases I've only listed the key position in the department but most departments are made up of a group of people doing a range of tasks) and there can be people who overlap or cover a range of these positions. It's all dependent on the project and company.

Companies may employ a number of people in many of these roles.  You could have 30+ animators on a project and a large company might be working on 3-6 projects at a time. And some of the positions are unique so there may only be one or a handful of people in that position at the company.

Tools
I'll list some of the basic training and software tools but this varies a lot as well. There's no standard to entry and many companies employ a mix of tools. There are number of software packages for most of these tasks so don’t take the tools I list as the only tools. I certainly don’t know what the units sold for each package. These aren't endorsements and software packages come and go over time. Some companies use software that has been discontinued. Some companies also employ there own proprietary in-house software that only exists at those companies.

Training
Some of the best training for most visual effects positions includes basic art and photography. For most of the jobs you don't have to be an expert artist in drawing and painting but should understand artistic principles and at least be able to make rough sketches to convey an idea. Understanding light and lighting are important and know the basics of filmmaking useful (camera motion, editing, etc).

Most of these jobs involve thinking visually. You need to develop your eye to judge images. You should be able to visualize the finished image and should be able to mentally run a scene back and forth in slow motion in your head. If you’re not a visual person then a visual effects career may not be the best match for you.

Most larger companies work on Linux or a Unix based systems but there are still a number of Windows and Mac based areas so some familiarity with all of these is helpful.

Some programming and computer science knowledge is very useful (Python, C, C++, Perl, etc) primarily for the more technical roles but this can be certainly of value to those even in the non-technical roles. Same with math.

Today you can gain a lot of hands on experience and knowledge on your own. Most software packages offer free trial versions (and/or low cost educational version). Video cameras and still cameras that shoot video are relatively inexpensive. The internet is full of tutorials from the vendors and others. There are quite a few books on visual effects including step by step tutorials. And there are a few visual effects schools online with classes for a fee.

Try to get exposure and some education in a number of positions. Example: Even if you’re planning to be a Technical Director, hands on roto and paint work is very useful to get perspective. Animation, compositing, lighting, rendering, etc are all areas as well that should be explored by all visual effects artists early in their training. It's possible you may find an area that is a better match for you.

Be very careful with for profit schools since their emphasis can be much more on their profits than your education.

Most job postings require a college education. How critical that requirement is dependent on the specific company and HR department at the company. Certainly the key aspects of knowledge can be obtained without a college degree but a college degree is likely to provide a broader knowledge base.


Be aware that some companies have their own proprietary software. As stated elsewhere on this blog you want to focus first in understanding the principles of the position you're focused on and then learn the software since the software will change overtime and from company to company. Knowing what menu item to select is much less useful than knowing what it’s doing. Learning the basic functions of a software package is relatively easy and fast but knowing what and why take much longer.

TIP: Do not under estimate how important actual experience is to learning the ins and outs of these positions. Although you’ve learned the basics of a program somewhere, the real process and pressure can be daunting. Even experienced people learn on each project and the field continues to change regarding both technology and creativity. It’s likely there will be new and different challenges on each project and you’ll be working with a wider variety of people. That’s why you see the x years of experience requirement listed on many visual effects job postings.

TIP: For any one interesting in a career in visual effects please read the job postings by the visual effects companies, especially the ones you would like to target. Every company now has a web site with job postings. There are also websites that specialize in job postings. Most job postings will go into more detail than I have here and provide more specifics. They'll indicate the specific software required at that company and the amount of experience required. That will help you determine what to focus on for your education. Realize that software and requirements change frequently so be sure to keep abreast of new postings from time to time. It's likely you will have to learn multiple apps that do the same thing if you wish to have a broader range of companies to apply to.

Wages
I won't be covering wages with these positions because there are no standards for these either. If wages are your main concern you should consider a different career. Wages tend to be good but your major driving force should be the work because you're going to spend so much time doing it.  Wage rates tend to be based on how much training, knowledge, skill, experience and talent is required for the particular job. How many others could do what you’ll be doing? How much responsibility and how many people will you be in charge further defines the wage issue.

Company Structure
Even this varies with companies. For most artists there is a lead who is providing guidance.  In some cases it may be the department head or a form of supervisor who will be guiding you. The visual effects supervisor reviews the shots in progress in dailies . CG Supervisor, Compositor Supervisor, etc. may be reviewing in dailies as well with the visual effects supervisor or may be doing incremental reviews. There may be separate dailies for animators with the animation supervisor.

Company Management
The positions listed are the hands on workers and artists. At any company there will be some management. In some companies there may be several layers of management. Those in management may or may not have hands on experience in visual effects and may or may not have business training. The quality of management varies as much or more than the quality of the artists.

CG is the abbreviation for Computer Graphics. CGI not used much within visual effects since image is redundant after graphics.

Positions

Visual Effects Production Department
The production department is required to bid and budget the work, oversee the production and make sure it's completed on time and on budget. This department will likely exist on the production side and also at each visual effects company.

Visual Effects Supervisor
Oversees the creative and technical aspects of visual effects for a film either working for the production or for a visual effects company. If they are working for a production then they will be reviewing most of the inprogress and all final submissions from the various companies along with the director.

The visual effects supervisor at a company will be reviewing the dailies at the company for the specific film project and will be dealing with the details, including interacting directly with most of the artists on the project at that company.

Training:  Great eye to determine what looks good and what looks real. Years of experience with most aspects of visual effects and wide knowledge of the different tasks and tradeoffs of the different methodologies. Ideally will have worked at a number of positions and have a lot of on set experience. Good management and people skills. Solid art and photography knowledge.

Tools: Laptop, notebook, measuring tape, inclinometer, tracking markers, etc.

Works with:  Director, cinematographer, production designer and other key creatives on the production in addition to most of the visual effects crew.

Visual Effects Producer
The visual effects producer is in charge of bidding, budgeting, scheduling, allocating resources and making sure the work gets done. This role is typically filled on the actual production and per project at visual effects companies. They manage the entire crew from a production standpoint. The production visual effects producer will be the one to send out and get bids from the companies.

The visual effects producer at the company will be dealing with creating the company bid and dealing with the specifics of the company schedule and resources.

Most large studios also have a visual effects producer/executive who oversees multiple films with visual effects. They hire the independent visual effects producer and visual effects supervisor for the productions and are key to selecting the companies that will get awarded the work.

Training:  Usually moves from Production assistant to Production coordinator to associate producer to producer but that varies. Experience is key here. Knowledge of the various steps and processes involved in visual effects. Requires a firm understanding of business and management. Does not require MBA but any business or management knowledge is useful.

Tools:  Word, Excel, Filemaker, Tactic, Shotgun, etc.

Works with:  Visual effects supervisor, Production coordinators, Production Assistants.

Production coordinator 
Handling secondary duties for the visual effects producer. Helping to gather information and making sure tasks are being completed by the various crew members. Takes notes at dailies and at meetings.

Training:  Usually started as a PA, gaining experience and knowledge of how the business operates.

Tools:  Word, Excel, Filemaker, Tactic, Shotgun, etc.

Works with:  Producer, visual effects supervisor, Production coordinators.  May be coordinator for specific department.

Production Asst  (PA)
Running errands, driving to pickup supplies, putting up storyboards, making copies of documents, getting status updates from crew members, misc work that needs to be done.

In the UK they have a position of Runner that overlaps this to some extent.

Can move into more creative and technical roles but only if they have the skills and knowledge to do so. Can be more likely to move up to coordinator.

Training:  Most training on the job and from experience. Common sense. Possibly car and driver license. Hard worker.

Tools:  Word, Excel, Filemaker, etc.

Works with:  Production coordinators, producer, visual effects supervisor. May be PA for specific department

Art Department

Art Director
Some visual effects companies have their own art departments. If they do then it’s likely an art director will be assigned per film. This person oversees the other artists and the development of the artwork.

Training:  Art school/classes. Active imagination. Very visually oriented. People skills.

Tools:  Photoshop, Painter, SketchUp, etc.

Works with:  Director, visual effects supervisor, production designer, animation supervisor  

Concept artists
Design, sketch, paint concepts based on the script and conversations with the director, visual effects supervisor, production designer and other key creative’s. This allows the director to refine their vision and provide images to use for communication and final design.

Usually hired directly by production (through art department) but may be supplied by visual effects company.

Frequently there are specialists - weapons, creatures, vehicles, landscapes, etc.

Training:  Art school/classes. Active imagination. Very visually oriented. Knowledgeable about specific area and able to draw from a number of inspirations.

Tools:  Photoshop, Painter, SketchUp, etc.

Works with:  Director, visual effects supervisor, production designer, animation supervisor (for creatures), makeup artist (for creatures)

Storyboard artist
Works with director to illustrate sequences for the film. Usually more complex scenes with stunts, special effects, visual effects but can be used to flesh out concepts or to help sell the studio. May be used as a starting point for the previs artists.

Training:   Art school/classes. Figure drawing a must. Cinematography (lens choice, composition, camera moves, etc), editing. 

Tools:  Pencil, pen, paper usually. Photoshop, scanner, etc.

Works with:  Director. Also likely to work with cinematographer, stunt coordinator, visual effects supervisor and 2nd unit director.

Previs department
Works with the director to create preliminary or concept 3D version of sequences, especially complex sequences with stunts, practical effects and visual effects. These help to provide better communication of the what the final sequence should be like. Previs is also used at times to help sell a movie concept to the studio (pitchvis) and to do quick mockups in post of new ideas (postvis)

Critical to make the previs relate to the real world it will be filmed in. (i.e. accurate modeling of the set and camera, avoiding flying the CG camera 10 feet into the ground since the real camera can’t, etc)

Previs may be done by a Previs company hired by production, a team of freelance previs artists or a department at a visual effects company.

Previs Artist
Training:  3D software, animation, cinematography (lens choice, composition, camera moves, etc), editing. Compositing also good.

Tools:  Maya, 3D Studio Max, MotionBuilder, Softimage XSI, Lightwave, etc.


Works with:  Director and ideally the cinematographer, visual effects supervisor, stunt coordinator and other key creative’s.

Plate supervisor
Oversees the filming of visual effects shots and makes sure they are shot correctly along with obtaining the necessary info. A visual effects supervisor usually handles this but schedules and volume of work may require a plate supervisor. Plate supervisor is usually a visual effects supervisor hired for a limited role of overseeing some of the live action photography.

Training:  Visual effects supervisor, on set experience, data collecting

Tools:  Laptop, notebook, measuring tape, inclinometer, tracking markers, etc.

Works with:  Visual effects supervisor, director, cinematographer,

Data collector
Usually 1-4 people assigned to a visual effects crew involved in the live action. A data collector records as much information as possible during the filming related to visual effects. Camera settings, lens settings, lighting information, measuring the sets and camera placement.

Additional tasks may include holding lighting references, shooting HDR images, shooting reference photos, running a transit, running a video camera for a witness camera (frequently 2 or more cameras used to film from other angles to provide animation reference).

Training:   Understanding of 3D very useful. Photography, record keeping. Frequently a member of the match move department.

Tools:  Measuring tape, inclinometer, notepad, still camera, video camera, surveyor transit

Works with: Visual effects supervisor, match move department

Visual Effects Director of photography 
Cinematographer who focuses specifically on visual effects. Knowledge of shooting miniatures, motion control, elements and greenscreens among other types of image capture.

Training: Photography, cinematography, lighting, color, compositing useful

Tools: Range of film/video cameras, lenses, lighting equipment, etc.

Works with: Director, visual effects supervisor

Scanning operator
In charge of scanning and digitizing film. These days much of this work is now done at labs or other companies besides the visual effects company. The amount of film being shot has diminished since digital effects first evolved. Has to adjust, calibrate and operate scanning system using the count sheets and color references.

Training:   Computer graphics, photography, understanding of film and scanning theory

Tools:  Specialized scanning software

Works with:  Cinematographer, visual effects supervisor, visual effects editor

Roto Department
Rotoscoping is the process of hand tracing an object or shape in a shot. This may be done frame by frame but these days the computer is usually able to do many of the in-between frames. Usually used to create mattes so the background may be replaced. This position existed even in pre-digital days but is used much more frequently these days because of the tools.

Roto and similar object isolation methods are also used extensively for 2D to 3D conversion. There are companies that specialize in this type of work.

For some people this is the starter position that allows a person with minimal visual effects training to start at a visual effects company and work their way up. If you’re trained in another role of visual effects (compositing, animation, etc) you don’t have to start in roto. (Although it’s still a useful process to have done)

Because of the labor and time aspects of this job and the fairly low learning curve required, these positions are being outsourced more to locations with lower costs of living and related lower wages.

Rotoscoper  
Person who does the roto or rotoscoping work.

Training:  Much of this training is done at the various visual effects companies but it's easy enough to get some basic self-training using trial software and free movie clips found online. You can get some sense for it using Photoshop or Gimp (free) using the pen tool but working with moving images is a magnitude more difficult and demanding. Note: This can be tedious work for many but some find it interesting.

Tools: Specialized tools - Mocha, Silhouette.  Compositing tools with roto- Nuke, After Effects,  Fusion, etc. Wacom tablet.

Works with: Compositors and technical directors

Paint Department 
There is a need to do a certain amount of hand paintwork even in this day and age. This paintwork is done using digital tools and at times requires frame-by-frame painting.  If there’s a rendering glitch or a problem spot on the edge of a composite, then those may be hand touched up. If an actor or prop is suspended by wires then those need to be painted out. If there’s a rig of some sort in the scene (for stunts or special effects) these will have to be painted out. Anything in the scene that shouldn’t be there (television dishes in a period film will have to be painted out. If a clean plate (no actors) is required then the actors will have to be painted out. An example of this is a stand-in actor for a CG creature that doesn’t cover the entire actor. When doing 2D to 3D conversion many areas of an image will need to be ‘cut out and offset’ to create the 3D look. The areas where the images were moved will show gaps of nothing that will need to be painted in.

Note that there are some basic tools to help with wire removal but much of this work requires a real eye of tedious frame-by-frame painting. These holes in the image need to be filled seamlessly without calling attention to themselves when moving. Sometimes these can be filled with images of the surrounding area (cloning) and sometimes they can be filled using some of the previous or forward frames where the hole had the correct image. And other times there may be no real source of image and the hole will have to be painted with care from scratch.

Consider a group of people walking toward camera and a vertical rod in the foreground that needs to be removed. A still is hard enough in Photoshop but now consider all of those faces and bodies moving and changing 24 time a second.

The paint and roto departments can be all one department.

Dustbuster
Someone who paints out dust on scanned film or glitches in digital capture footage. They typically clone from an adjacent frame or area next to the spot.

Training:  Good eye and basic understanding of painting out spots from other sources.

Tools:  Compositing systems with frame-by-frame paint tools such as Nuke, After Effects, etc. Wacom tablet.

Works with:  Paint department

Painter
There are various titles for this position depending of the specialty being done. Wire removal, rig removal, etc.

Training:  Good eye and attention to detail. Art school/classes certainly useful even for this level.

Tools:  Compositing systems with frame-by-frame paint tools such as Nuke, After Effects, etc. Wacom tablet.

Works with:  Compositors

Modeling Department
Creation of every set and object within the computer. Most of the time these are built from scratch based on blueprints or other reference materials. Sometimes built from scans or a pre-existing model. Can also refer to physical model shop, the type used primarily pre-digital but still useful. Most visual effects companies no longer have physical model shops so they will sub-contract this work when required.

Model Supervisor 
Oversee the creation of CG (or physical) models.
Manages the modelers involved in the production and keeps the quality level and detail consistent.

Training: Experienced modeler

Tools: for CG -  Maya, XSI, Cyslice, ZBrush, Mudbox, etc.

Works with: Modelers, visual effects supervisor

CG Modeler
Builds computer graphics models from scratch or modifies from 3D scans. Usually sub-divided into non-organic (hard surface) modelers (spaceships, sets, etc) and organic (soft body, creature) modelers since each of these has slightly different requirements and approaches.

Training:   Computer graphics training, understanding of architecture, reading blueprints, mechanical drawings all useful. Nurbs and other modeling methods.

Tools:  Maya, XSI, Cyslice, ZBrush, Mudbox, etc.

Works with:  Riggers, Texture painters, visual effects supervisor, modeling supervisor

Physical Modeler
Builds physical (real) miniatures and models from scratch or from a combination of parts.  Usually a small team of people with both general and specific talents. Sculptors, painters, mold makers and other specialists exist.

Training:   Art school/class, hands on model building, machining, wood working, sculpting, using different materials
Tools: Wood shop, machine shop, plaster, plastic, silicon, etc.

Works with:  Visual effects camera crew, visual effects supervisor, director, art department

Rigger
Rigger is the person who constructs and 'rigs' the CG animation skeleton to a CG creature, digital double or any other type of sub-animation required. This can be a complex task since it requires placing the right type of pivots in the correct place and setting the range of motion and setting the animation points for the animators.

Training:   Computer graphics training, understanding of animation,

Tools:  Maya, Mel

Works with:  Modelers and animators

Texture Artist / Painter
Responsible for painting textures for any computer graphics model, object, creature or set. Some may involved pure paint in Photoshop or a 3D paint program and some may involve collecting and selectively combining multiple photos to create the final texture. Uses scanning photos and other materials to paint a CG actor or prop. Frequently paints other layers (specularity, dirt, etc) to be used for specific purposes.

Training:   Art school/classes, photography, CG classes

Tools: Body Paint, Deep Paint, Photoshop, Mari, Maya, etc.

Works with:  CG Modeler, CG supervisor, visual effects supervisor, technical director

Skinning
There are different methods to ‘skin’ CG creatures.  Something like a dragon may have very hard and non-moving areas of the skin and other areas such as the face that will be very flexible or include certain types of folds.

Training:   Computer graphics training, understanding of modeling, texture painting and rigging all useful

Tools:  Maya, Mel, proprietary tools, etc

Works with:  Modelers, Technical directors and animators

Animation Department
Responsible for moving characters (adding life to them) and objects.  Animation can be computer graphic characters, computer graphic spaceships and mechanisms or stop motion (physical characters and objects moved by hand)

Animation supervisor 
Experience Animator who oversees all the animation on the film project. Combination of technical trouble shooting, creative input and management. Helps to cast the animators for specific characters or creatures. Usually one of the right hand person to the visual effects supervisor. If it's a project with a lot of animation then typical works along side the visual effects supervisor.  

Training:  Experienced animator. Animation school or classes. 

Tools: Maya, 3D Studio Max, Softimage XSI, etc.

Works with: Director, visual effects supervisor

Animator 
Person who does the animation. These could be broken down into 2D (cel animation for cartoons or older Disney style animation) and 3D (Computer graphics 3D animation such as Pixar films or in visual effects such as dragons) categories as well. I'll be focused on 3D animation.

This may be further broken down into:

Character Animator 
Animator for characters that speak and react.

Training: Animation school or classes. Studying footage of people. 2D animation a great start to understand animation and characters.

Tools: Maya, 3D Studio Max, Softimage XSI, etc.

Animal or Creature Animator  
Animator of real and imaginary creatures (i.e. horses, alien reptiles)

Training: Animation school or classes. Studying footage of animals. 2D animation a great start to understand animation.

Tools: Maya, 3D Studio Max, Softimage XSI, etc.

Technical Animator   
Animator for precision (i.e. Mars spaceship animation for NASA)

Training: Animation school or classes. Understanding of physics, math and programming useful.

Tools: Maya, 3D Studio Max, Softimage XSI, etc.

Stop Motion Animator 
Animator who hand moves a physical stop motion puppet

Training: Animation school or classes. Studying footage of people, animals.

Model building experience a plus including machining.

Tools: Still and video cameras. Various software packages specifically for recording stop motion and checking frames. Surface gauges and other means of checking placement of puppet.

Computer Graphics (CG) Department
Dealing with all the issues of rendering the CG models or scenes.

CG Supervisor 
Experience Technical Director who oversees all the technical directing on the film project. Combination of technical trouble shooting, creative input and management. Determining and advising on key methodologies, software and pipeline. Usually one of the right hand person to the visual effects supervisor.

Training:  Technical director. Computer graphics training, ideally knowledge of photography,

Tools:  Maya, Renderman, VRay, etc.  Nuke, scripting, shader writing, Mel scripting, etc all useful as well.

Works with:  Animators, compositors, vfx supervisor, match movers

Technical Director (TD)
Technical director is an all around CG position that usually focuses on lighting and rendering to turn a CG model or animation into a final render.  They also cover some of the more technical details of computer graphics in addition to the creative task of lighting. Closest to a Director of photography role. This title is sometimes appended to the end of a specific task. Lighting Technical Director, Pipeline TD, Cloth TD, etc.  

The Directors Guild controls film credits so any credit with director in the title needs their approval. So this position is frequently listed as digital artist or something different.

Training:  Computer graphics training, ideally knowledge of photography,

Tools:  Maya, Renderman, VRay, etc.  Nuke, scripting, shader writing etc all useful as well.

Works with:  Animators, compositors, vfx supervisor, match movers, leads

Lighter / Lighting TD
Lighter focuses on the lighting of a computer graphics scene. Used interchangeably with technical director at some companies.

Training:    Computer graphics training, ideally knowledge of photography and practical lighting.

Tools:  Maya, Renderman, VRay, etc.  Nuke, scripting, etc all useful as well

Works with:  Animators, compositors, vfx supervisor, match movers, leads
  
Look developer (Look Dev)
Works on creating a specific look or visual aesthetic.  This look may be for a given sequence, background,  creature, ray gun, force field, etc. May be a task provided to a technical director or compositor to flesh out the look and techniques required to get a specific look based on concept art or other references.

Training:   Computer graphics, art, photography and animation all useful training

Tools:  Maya, Nuke, Houdini, Photoshop, etc.

Works with: CG supervisor, visual effects supervisor

Pipeline TD or Developer
This can cover a few different people with different specialties. A visual effects the pipeline amounts to the workflow process. With as much data, elements and shots being moved from artist to artist the idea is to make sure make it as efficient and error free as possible. This can involve concept design of how the work will flow and what software will be required to developing specific software to make this possible. Software can be scripts, databases, plugins and custom apps.

Training:   Computer programming

Tools:  Unix, Linux, Windows, Mac, scripting languages, C, C++, SQL, etc.

Works with:  CG Supervisor

Shader Writer 
This person writes specialized programs to handle the look of materials on the CG objects. Shaders can be used also to create specialty looks such as wet or cartoon style.

Training:   Technical director, computer science, computer graphics

Tools:  Renderman and other rendering software, OpenGL

Works with:  Technical Director, Texture painter

FX Technical Director 
Focused on running dynamic simulations to usually recreate real world physics. Creating sparks, smoke, fire, water

Training:  Computer programming, physics, computer graphics, Maya Mel and other APIs and scripts for programs

Tools: Maya, Houdini, specialized particle plugins and systems, etc.

Works with: Technical directors, compositor

Render Wangler 
Person who monitors the computers and render farm rendering CG images and digital composites. They also are involved in calculating the number of procs (processor unit time) available.

Training:  Knowledge of various rendering farm management software. Databases. 3D software and compositing software knowledge.

Tools:  Various render farm management programs and scripts

Works with:  Visual effects supervisor, producer, CG supervisor

Compositing Department
Compositing is the process of combining multiple images of live action, computer graphics and other images.

Compositing Supervisor 
Experienced Compositor who oversees all the compositing on the film project. Combination of technical trouble shooting, creative input and management. Determining and advising on key methodologies, software and pipeline. Usually one of the right hand person to the visual effects supervisor.

Training:  Computer graphics, Visual effects training, Photoshop compositing, understanding of photography, light

Tools:  Nuke, Fusion, After Effects, Fusion, etc.

Works with:  Technical Director, Visual effects supervisor, Lead, CG Supervisor
  
Compositor
Combines multiple images and elements of live action, computer graphics, etc to make the final image shot seen in the movie. Finesses and adjusts to make the final composite seamless.


Note: Compositing is also used in 2D to 3D conversion. Although it uses many of the same tools and skills, it’s a different task, pipeline and different goals. Compositors can work on standard visual effects shots or conversion but will more likely need some initial guidance when switching from one to the other to learn the pipeline and additional tasks.

Companies should be clear of the type of compositing they are looking for and job seekers need to confirm what type of compositing they will be doing.



Training:  Computer graphics, Visual effects training, Photoshop compositing, understanding of photography, light

Tools:  Nuke, Fusion, After Effects, Fusion, etc.

Works with:  Technical Director, Visual effects supervisor, Lead, CG Supervisor

Flame operator / Inferno operator
These artists operate high end visual effects packages which include high speed hardware, drives and special software to enable interactive compositing and image manipulation. These fast setups are used frequently on Commercials where fast interactive turnaround with a client is desired. They also fill a role in television and feature films where their cost and interaction makes sense.

Training:  Art school/classes, visual effects, computer graphics

Tools:  Flame, Inferno

Works with:  Director, visual effects supervisor

Matchmove Department
Take original footage and creates a CG camera that matches the live action camera motion and places CG model sets to match corresponding live action sets. In some cases they or animator may do matchamation or rotomation where the motion they are tracking is a moving human. 

Matchmover  
Match CG camera to live action camera. Use of both automated tools and manual alignment.

Training:   Computer graphics, 

Tools:  Maya, PFtrack, 3D Equalizer, Bijou, etc.

Works with:  Technical director, animator

Layout Artist
In animation these are the people who may place the camera, adjust framing and adjust items in the scene. For visual effects this overlaps with match moving.

Training:   Art classes, cinematography

Tools:  Maya, etc

Works with: Technical director, animator

Motion Capture Group
Team of people who work with actors, stunt people and others record their movements. Usually requires specialized cameras, costumes with some type of markers and specialized infrared light sources. Usually setup at a permanent location at a company or at a company that specializes in motion capture for the companies that don't have motion capture. There are a range of people involved in this.

Training:    Computer graphics training, animation understanding, ideally understanding of both human motion and data capture theory.

Tools:  There are a number of off the shelf motion capture systems so the specific system will vary with the company.

Works with:  Directors, actors, stunt people, vfx supervisors, animation supervisors

Matte Painting Department
Creating paintings to complete the scene. These may be entire backgrounds or may be extending the top of a set.

Matte Painters
Person who does the painting. In pre-digital days this person would have to paint from scratch. Digital tools like Photoshop allow duplicating areas and re-using patches of other photographs. Today matte paintings utilize 3D software to create at least 2 1/2D images so matte paintings are more than just pure static images.

Training:   Art School/Classes, knowledge of architecture, perspective, color, light, understanding of compositing and 3D software also useful

Tools:  Photoshop, Nuke

Works with:  Compositors, visual effects supervisor

Color Grader / Color Timer 
Adjust color in shots to keep a consistent look for the sequence.

Training:   Art, photography, color theory.  Note color blindness would be a problem.

Tools:  Avid, FCP, DaVinci, specialized color tools

Works with:  Director, cinematographer

3D Stereo supervisor
Oversees the 3D stereo aspects of visual effects whether created in stereo or involved in the 2D to 3D conversion. Helps to set consistent depth amounts along with the convergence and IA settings when possible.

Training: Knowledgeable about stereo

Tools:  Nuke, Occula, Mystica, etc.

Works with:  Director, visual effects supervisor, CG supervisor

Motion Control Group
Motion controlled camera is a camera that is motorized to produce very controlled and repeatable motions using motorized pan, tile and dolly among other axis. Can be used with motion control model or object movers. Motion control is used for specialized purposes. Filming where an exact match of live action is required such as twins. Can be used for stop motion or time lapse photography. Used extensively pre-computer graphics for filming physical models. Still used for some model photography. Most visual effects companies hire 3rd party motion control companies when required these days.

Motion Control camera operator 
Runs motion control system. Creates the moves using joysticks and numerical input.

Training:   Understanding of camera motion. Frequently a cameraperson who has shifted into technical specialties.

Tools:  Specialized hardware and software systems.

Works with:  Cinematographer and visual effects supervisor

Visual Effects Editor 
On the production side this is the person working with the main editor to prep the materials (media, count sheets, etc) for the visual effects companies and interact with them. At a visual effects company this person works with production editing to make sure the correct media and information is provided and sent. They also keep an edited version of sequences up to date and edit in the in progress visual effects shots for review.

Training:   Filmmaking school, editing, visual effects knowledge

Tools:  Avid, FCP, etc.   

Works with:  Director, Editor, visual effects supervisor
  
Research & Development Department
Develop software tools to achieve new looks, improve speed and provide new tools to artists 

R & D Developer
Designs and writes specialized code to help with the production of visual effects. These may be full applications, plugins or scripts. (i.e. specialized hair tool, etc)

Training:   Computer science, computer programming, math, 3D graphics programming, image processing, C, C++, Python, etc  

Tools:  Compilers, SDK and APIs from various software vendors (such as MEL for Maya and C++ API for Nuke)

Works with:  Departments in need of specialized software development.

Special Effects Crew
Special effects is the team hired by production to do on set effects such as explosions, breaking glass and wire work. They work closely with visual effects and some of the larger visual effects companies may employ special effects people but most are hired by production these days. Good for creating practical effects elements for use in visual effects shots - torches, explosions, etc.

Training:   Hands on apprenticeship, pyro licensing and other safety certifications as needed. Understanding of practical mechanisms and explosives.

Tools:  Machine shop, wood shop, explosives, candy glass, etc.

Works with:  Director, Visual effects supervisor, Production Designer, Cinematographer

Update 8-3-2014
I've now seen a few job postings with Supervisor in the title (CG Supervisor, Production Supervisor, etc) and then discover that some of these are considered Coordinator level positions, even though the posting implies supervising people. I find this very confusing and it may be strictly to get these people classified as management to avoid paying overtime.

To be clear - a supervisor position is just that, supervising others in terms of assigning tasks, overseeing the work, guiding them, etc. They need to know the creative and technical aspects of the area they're covering and should know as much more or more than those they are supervising.

A coordinator typically is one who gathers and dispenses information at the request of a producer, supervisor or others. Their role is to help coordinate or sync different people and departments to make things run smoothly. They work with others but do not typically manage others (possible production assistants) And they should not be considered supervisors.

Related posts:
Visual Effects Producer - Audio
VFX Management
 PostProduction

Feel free to add comments with other positions, tools, and information.

Tuesday, December 06, 2005

PostProduction

PostProduction for Visual Effects is covered in this podcast.

Here's the timeline:
2:10 Client turnovers
6:24 Effects editorial
8:41 Scanning
12:08 Effects turnovers
15:21 Artists - Matchmover, Animator, TD, Compositor, Rotoscoper, Painter, CG Modeler
19:10 Work day
22:17 Dailies
24:34 Client reviews
26;33 Temp screenings
28:09 Balancing work and schedule
29:36 Filmmaker

Transcript
Today I'll be discussing Post-Production for Visual Effects. This will be an overview with later podcasts to cover each specific area in more detail.

As with all of these podcasts I'm providing information based on my experience. Every effects house and film will be slightly different so use this as a starting point.

Effects Pre-Production
By the time the actual work is to start on the visual effects most of the CG models that will be animated will have been built, chained and painted. The various pipelines should already be set up. A pipeline is the workflow and the support for that workflow with specific tools. A shot may be passed assembly line style from one person to another. It may also be worked on by more than one person at the same time. The images and the data is passed from one software package to another. Animation may have to be done in one piece of software and then exported to be lit in another piece of software and then rendered using yet a different software. Creatures with fur may have to go through a different render pipeline than non-furred creatures. The output images are then composited in yet another piece of software. The idea is to make this transfer of data as easy and seamless as possible. This may involve writing special databases and scripts to help move the data and keep track of it. If this is an established effects company most of this may already be in place but there always seems to be some changes required. The CG supervisor is usually working on this pipeline while the film is being shot.

If there is an animated CG creature most of the voice recordings are also done by this point.

Client Turnovers
The first step of the postproduction process is the client turnover.
When a sequence has been edited the director, editor and producer turn over the visual effects shots to the effects company. The effects company team includes the effects supervisor, animation supervisor, effects producer and typically an effects coordinator. Everyone gathers around the editing machine, usually an Avid, while the director explains what's required in each shot. A 10-minute sequence in the film can easily take 2 hours to review and discuss due to the complexities of the shots and action.

Even though the effects shots have been storyboarded in pre-production there are always additional details now that the background plates have been shot. There are always some changes as well in the shooting and editing process. A single planned shot may have been broken into to 2 shots or two shots may have been combined into one big shot. In some cases shots have been dropped for pacing reasons and a few may have been added to help the story telling.

Depending on the shot it may be difficult to make the edits, especially for a shot where most of the scene will be added later. If a shot will be all virtual as a standalone miniature shot or a CG virtual shot then they will be cutting in a storyboard or an animatic to use as temp placeholder for the real shot to come later. They may have cut in the reference take so they can see how the action flows but they will have selected their real take based on the actors performance. In other cases they want to use a reference take and you'll need to remove the other actor or monster stick.

One thing I try to do when possible is to create mockups before the edit. I did this quite a bit on Van Helsing. A QuickTime of a shot would be copied to my iPod while we were shooting and then I'd tried to do a basic mockup at night back at the hotel and dump it back out. This tended to be mainly 2D mockups but was enough for them to check the take and get a sense for the action. It also allowed me to see how well something was working and to determine if we may have to make adjustments in the future.

The editor or his assistant may do simple mockups on their editing system. A shot may be split or a simple bluescreen key may be done. If animatics are generated it's sometimes useful to do a render of just the foreground or background. If it's a background this can be comped behind a bluescreen and if it's a foreground piece this can be comped over the real background. All of this is done to provide a better sense for which take and timings work best. In some cases they may pick alternate takes if there's a problem later with animation timing.

Since each shot is covered in great detail with much finger pointing at the video screen and pantomiming by the director we usually video tape these sessions in addition to taking notes. It's important during these sessions to get as much information and detail as possible since any miscues could be costly in time and money.

Since the number of visual effects shots these days is going up and the amount of postproduction time is getting shorter it's very common to do these turnovers while the film is still being shot. This is usually spelled out in the contract since the film has a fixed release date. The delivery date for all the shots to be completed by the effects company is called the finals date and can be 2 weeks to 2 months before the release of the film. The editor will start making an assembly from the dailies and the director will review this after a day of shooting or on the weekends. Once the director is happy with a full sequence the turnover will happen at the end of a shooting day or on a weekend as well.


Effects Editorial
Once the client turnover is done the show's editorial department usually ships a copy of the edited sequence. This may be on a tape but ideally is in Avid project or some means for us to assemble our own edited version. It's important to have not just the visual effects shots but the surrounding live action shots as well. This will allow checking the in-progress effects shots in context so we can check the timing, actions and the match.

The effects editor creates a breakdown, line up or cross over sheet. This will list the sections of film that need to be scanned and any additional elements required. The standard references of the lighting sphere and other items are some of the additional elements. The effects or animation supervisor may want to scan additional reference footage.

The editor has the option of extending a live action shot at any point because there's usually plenty of additional footage on the head and tail of the selected cut. With visual effects though you end up with a shot just as long as specified. To provide a little latitude for offsetting or increasing the shot length an effects shot usually includes additional frames at the head and tail of the shot. These extra frames are known as the handle. This could be 2 frames at each end or up to 16 frames at each end.

The more frames you have, the more flexibility in the edit to make an adjustment but these added frames add an additional cost to each and every shot. 16 frames of handle would mean a total of 32 frames of extra work that likely won't be used. That's a second and a half. That's a lot since the typical effects shot is 5 to 8 seconds in length. A 4-frame handle is probably most typical. The average shot length and required handles is spelled out in any effects contract. The size of the handle can be discussed on a shot by shot basis since in some cases the extra frames may require a lot of paint out or other work.

Scanning
Once the information is together and the original negative is available it's scanned into the computer. Some effects houses do this themselves and others send this out to a service to be done. Normally I try to obtain timing clips from the DP (director of photography) so we can do some basic color balance when scanning. A timing clip is a few frames of a shot or shots that the DP has worked with the lab to create and is an example of the color and brightness for the final shots. This shows the DP's vision of what the end result should look like. Some places wait until the end of the process to do a full color balance.

Scans are usually specified by their resolution, bit depth and format.
There are a number of formats and possible aspect ratios when shooting: 1:85, 2:35 anamorphic, Super 35, etc. It's normal to try to scan a bit more of the frame if it exists such as in 1:85 on the top and bottom (and one side if it's academy format) This allows a bit more room to move the clips.

Typical resolution for feature films is approx 2k or 2048 pixels across. Some films are being done at 4k or 4096 pixels across but that requires 4 times the amount of data and processing. The bit depth refers to how many levels of lumance for each color. 8 bits is 256 levels and provides over 16 million colors for red, green and blue. 10 bits or higher is now more common since it provides finer increments of color. It's also important that these scans be logarithmic to provide the best use of those bits. Some people think films have to be more than 2k and have deep color but the fact is quite a few well known films were done with 8-bit and less than 2k resolution. The file formats are usually in a Cineon format but there are many others, especially for in house scanning.

High-resolution images take up a huge amount of storage space. Even a simple 8-bit, 2k image will take 10 megabytes per frame. Since film runs at 24 frames per second and since there are usually multiple film elements per shot that starts adding up quickly. When possible images are sometimes compressed in a lossless compression. This will reduce the amount of storage required and reduce the amount of data to be copied between computers. These scanned shots are dumped to a high-density data tape or across a network.
Even though effects houses may have terabytes worth of storage shots are usually brought online (loaded on to hard drives) when the shot is about to start and they're normally removed as soon as the shot is finaled.

After a shot is scanned it typically goes through dirt removal. A team of people sit at computer workstations looking for dirt and scratches that have to be painted out, typically by hand, before the shots are ready for production.

Effects Turnovers
When a few shots have been scanned and are ready to be worked on there are turnovers for the actual people working on the shots. A shot usually goes through a number of departments, some of which work simultaneously on the shot and other departments that may have to wait until the previous department finishes. A single turnover may happen with all the key people who will be working on the shot or it may be broken into multiple turnovers for each department.

The shot will be displayed on a computer or video monitor and the animation or effects supervisor will step through the key issues much as the director did. It's important for all those in the turnover meetings to have a pen and paper for notes. This would seem obvious but a lot people try to remember every detail only to find out they forgot something a week later.

In some cases a section of video of the director turnover may be shown just to make sure there's no miscommunication.

Every shot and every element will have an ID of some type. Possibly the first 3 characters of a sequence name followed by the shot number and then possibly a letter or letters signifying the element itself. All this is written up by editorial and provided to the people working on the shot. Larger houses also have a database with info and access related to each shot. This is critical since one of the bigger tasks in doing visual effects is keeping track of all the pieces.

A single shot can take one person a few hours or can take a number of people in 6 departments a few months to complete. A few linear weeks are probably typical with it being touched by 5 or 6 people. Most people are assigned 2 or 3 shots so they can continue to work even while waiting for feedback or additional elements on one of their shots. Each person is assigned a basic schedule and deadline for their portion of the work.

For a large sequence in the film there may be a sequence lead for technical directing and a lead for animation. The lead TD will establish the basic lighting for the sequence based on the live action and will act as mentor to the other td's and compositors working on the shots in that sequence. They'll also be involved with specific R&D required for a sequence. The animation lead will try to establish the basic character action for the sequence and help to mentor the other animators as required.

A show could have a dozen people but more than likely will have 50 to 300 people working on it. A large effects house may have 2 to 5 shows going on at one time. It's important that schedules and plans are laid out and that sequence leaders be able to manage their team. These crews are made up of true artists that are at the core of the effects work you see. They have a balance of artistry and craftsmanship.

Some of these artists include:

MatchMover
A matchmover is provided with information about what's critical in the shot and what's not critical. In some cases a rough matchmove is requested first so it can be passed on to the animator to get started on. The match mover is provided with measurements, photos and additional information from the set for a specific shot.
Once the matchmove is done a grid or spheres are rendered as an overlay with the background to check the work.


Animator
The animator on the shot will take the matchmove and start roughing out the animation. Ideally the sequence lead animator may block out or rough in the animation over a sequence of shots. A low res single color plastic render will be created for each shot. This is overlayed with the background plates and cut into the sequence. Once this is done it is sent to the editor and director for review.

Technical Director
The Technical Director or TD is the person that does the lighting and rendering of the CG creature or model. The also deal with any 3D technical issues on a shot. On the credits they're usually listed as Digital Artists since the Directors Guild controls anyone who get's a director credit of any type.
The TD can start the lighting as soon as he or she receives the first animation from the animator.

Compositor
The compositor is the person who handles the 2D work including compositing or combining all the different pieces of film or elements, including computer generated elements. They start their work prepping the different images, requesting paint and roto work as need be and then take any rendered CG images from the TD. The compositor adjusts the edges and color balance of each element to make sure they blend seamlessly.

Rotoscoper
The roto person creates hand drawn mattes as needed. If a shot has a CG creature run behind a table someone has to draw the outline of the table and create a high contrast matte that will be used to place the image of the table over the image of the creature. In the case of something like Dragonheart the actor in the foreground has to be rotoscoped while moving so we can place the dragon behind them.

Painter
The painter goes through at the start and paints out any special rigs or other items that shouldn't be in the shot. They try to use the clean plate if it exists.
When a shot is finished it may require some slight touchup on a few frames where the render or composite wasn't quite right. There's much more handwork involved in doing visual effects shots than most people realize.

CG Modeler
Actually modeling usually involves a number of people. People who do the model, others who paint the texture maps and others to build the shapes, skin and skeletons for animation purposes. Hopefully this has been done but additional model shapes may be required, especially for facial animation, while the shots are being worked on.

Some of these tasks such as TD and compositor may be combined into one artist. It's possible for a single person to do most of the shot themselves but this may not always be the most efficient.

Work Day
Once the shot has been turned over each individual goes back to their workstation to work on the shot. As they progress they let other's know there is an update. In many cases they may check their work into a database. This is similar to software development where files can be checked in and out.

When an animator is going to do additional work it's important for them to have the latest version of the matchmove. Likewise it's important for the TD to have the latest animation to light and render.

In the old days you had to finish any work by the end of the day (such as opticals or motion control) to get the film into the lab. In the digital age you try to get everything done before the end of the day as well so the computers can render over night.

The TD may be checking single frame renders during the day as he or she makes adjustments to the lighting. The animator will be looking at wire frames or plastic renders to check animation and the compositor is working on a few key frames to make adjustments.

One of the things that these people also do during the day is to calculate the amount of computing power required. If you have a 300 frame shot and each frame will be taking 1 machine hour to render that needs to be taken into account. A large effects house will have a render farm made up of the individual machines as well as a cluster of specialized rendering computers. A single shot can be spread over multiple computers over the network. A frame could be sub-divided in to multiple sections to be rendered or each frame can be passed to a different computer. There may be dozens of shots being rendered overnight.

Everyone that needs rendering usually logs their request into a database and the CG supervisor will have to review the requests versus amount of computing available and determine how the work will be done. Some of the overnight work is done at lower resolution so animation and basic rendering can be checked without using up too much computing power. If it's a final render then it will have to be a full resolution with motion blur and fur rendering and anything else. These types of renders may take a few days and could be scheduled to run on the weekends.

Additional elements
In preproduction and during filming a list is made of other specific elements that need to be filmed. These could be smoke from chimneys, fire for a building or water splashes that have to match a creature jumping into the water. During the compositing process a few more elements may be found to be necessary to finish the look of the shot. These will have to be filmed and scanned before the compositor can complete the shot. Ideally the effects company has past footage and generic elements for at least some of this.

Dailies
On every show the dailies are handled a bit different. The number of shots and the length of time to review and comment can make it very time consuming.

In the morning the effects supervisor and animation supervisor may meet and quickly review the shots together in private. If the animation supervisor has any comments about rendering, compositing and lighting issues he or she would make it here and visa versa.

Dailies can be held in a large theater with high hres video projection with the entire crew or could be in a smaller room with just the sequence people or could just be a one on one review of the work with the supervisor and the artist. All of this is a balancing act between making sure the artists get feedback on their own work as well as seeing the related work and at the same time avoiding tying them up for all morning sitting and watching dailies.

Animation and TD/Compositing dailies are usually separate. Hopefully the effects editor has already cut the dailies into the edit so it's possible to review the shot in context.

I usually try to review the shots on my machine before dailies so I have some notes and can quickly cover a lot of issues. Some people want to wait for a review until they've fine-tuned their shots but this may mean a week until any progress is seen. If for some reason there's a mistake or miscommunication while the artist is polishing the shot then all that work will have to be re-done.

As with the turnovers all artists should bring a pen and pad of paper to take careful notes during dailies. When possible the TD and compositor should explain what they've done and what they still have yet to do. Because of time constraints most of the focus will be on work that still has to be done or improved rather than praising the artist for sections that have been completed.
During the course of the day the supervisors may check in with the artist or may get email from an artist requesting a review or a question.

Usually there is a coordinator assigned to each supervisor. They help to follow-up with the artists and track down information as needed.

Reviews
Because of the complexities and time of doing visual effects it's critical to make sure to frequently review the shots in context. Some people try to wait until they're finished with the shot but there's a strong likelyhood the director will want to change something and they may not be able to make a critical decision until they see the surrounding shots. Each director has a different ability to visualize the shots. Some have difficulty in viewing plastic renders and making animation decisions based on these. This is a learning process for working with each director.

Once or twice a week the supervisor will determine which shots to show the client. These may be shots in progress where a confirmation is requested, or shots where a question has come up or a shot, which is considered a final by the supervisor. Usually there's an animation final on a shot and then later a TD/compositing final. The supervisor will go to the editing room to show the director and editor the new work. If the director is in another city a DVD may be sent or a live video link is used. The latter is much preferred. The video link allows the artists to be present and hear the comments right from the director.

It's still possible for changes to be made at any point. If changes are outside the scope of the original budget for the shot then a change order may be called for where a new or updated budget is submitted for approval.

Once the shot has finaled on video by the director it needs to be rendered full res if it hasn't already been and then be filmed out. The director views this film projected on a full size screen to determine if it's a final final. When a shot is finaled a few frames are saved at full res for PR purposes and the final shot and key elements are backed up and removed from the server.

Temp screenings
The director probably has to show the film to the studio a few times during the course of postproduction. Of course the director will want as many of the shots done or in at least some form of completion even it's with temporary shots. This is better than showing an actor sword fighting with a ping pong ball on a stick or actors on a bluescreen pointing to a non-existent object.

These temps are also used to help the composer and sound effects people since this work will be ongoing even while the visual effects work is still in progress.

As the film gets closer to release it becomes important for the studio to do test screenings. Unfortunately test audiences don't have too much tolerance for plastic renders of dinosaurs and other temporary shots. If the test screening is a wild success the studio may authorize more effects shots. If a test screening does poorly they may want to rethink and redesign some of the effects shots.

Trailers
The director and marketing people select shots that they think would be good in a trailer. A trailer being the ad for the film shown in theaters and on TV. Unfortunately they sometimes select shots that aren't even scheduled to start for several months. As a result trailer shots can be rushed and the version for the final film will be noticeably better. It's best not to judge the effects work too much based on the trailer.

Balancing
For those of us working in visual effects it becomes very easy to fixate on every detail in a shot. This is especially true since we can change everything in a shot. We loop the footage over and over on a computer monitor or large screen at full magnification. We know where to look so it's easy to spot any imperfections. We have to remind ourselves if we don't spot something in 2 or 3 times through then the shot's done.

The same problem holds true with the directors as well. If they film a jet fighter flying by for real then they will select a take and move on. If it's a motion control model or a CG model then the director usually gets caught up in making the jet roll a specific amount at a specific frame even if the original take matched the live action version. Just because there is infinite control doesn't mean there should be an infinite number of takes.

All this is important because in order to generate hundreds of effects shots in a given amount of time you have to keep moving ahead. If you spend half the postproduction time on a fourth of the shots then the other shots will be rushed and the quality level will drop. It's important to develop a pace that can be maintained during the production or you'll end up working long weeks and hours the closer you get to your finals deadline.

Filmmaker
If you're doing your own film and even all of visual effects there's still some principles to apply.

Before you begin the full postproduction process make sure you have your pipeline working. It's better to work out the kinks before you have 30 shots and a looming deadline. Run a short test shot from your editing software to your 3D software to your compositing software and then back to the editor. Use your manual and online help to make sure you understand the different steps involved.

If this is video, export from your editing software with some additional handles. Keep a log book of the shots including timecode and other information. Avoid re-render and recompressing when possible and use lossless compression such as the QT animation codec if you plan to manipulate the images through more than one software system.

Find out the required field order. Most video footage, especially DV is set for lower field. If this is 24p video make sure you understand how to remove and how to add pulldown. Some effects composting software can do this but you may want to do the pulldown removal in the editor if you plan to use multiple programs.

Do test sections and frames and set your programs to render overnight for rendering if you can.

If you're having other people help with the shots then do a turnover with them and be clear about what you need. Figure out a naming convention and how you plan to pass images back and forth. Firewire drive, networking, etc.

Try to keep an honest assessment of your work and the time required. Is the quality up to the level you need? Can you finish all the shots in the time you have? Use a schedule to help keep track of your time and your target.

Try to rough in the animation or basic composites for a sequence so you can be sure it's working in your film before you spend a lot of time fine tuning the shots.