Compositors are often called "The Finisher". The buck stops with them - a film's Director will approve shots coming out of this department, that will make up the final edit.

What is a Compositor?

Compositors are often called "The Finisher". The buck stops with them - a film's Director will approve shots coming out of this department, that will make up the final edit. A Compositor is responsible for assembling the final shot by combining final layers/renders from other departments.

Although it is primarily a 2D role, compositing is interesting in that it requires someone to have an artistic eye, as well as a good knowledge of the CG process, cinematography and storytelling.

Compositors create the final image of a film or a sequence of shots, by combining various digital materials such as live action footage and computer-generated images. They also consider the visual aspects of a scene and relight any objects that get hit by a light. Compositors are the last part of the VFX production process that's done on-site. They can be freelancers or employed by different studios.

Entry Level Skills & Capabilities

The following information outlines the exact skills you need to demonstrate as a Certified Digital Artist. You must be proficient and capable of completing all these skills and capabilities.

Important! The following list of skills is used by our assessment team to verify if you qualify for a Certified Digital Artist (CDA) accreditation. The word "Bonus" indicates skills that are highly desirable, but not required to be certified. Think of them as a bonus skill that will impress.

1. Communication skills

  • Strong communication skills to describe and present your work with confidence
  • Willing to show progress frequently and able to receive and discern feedback objectively

2. General

  • Strong understanding of colours, colour spaces and working with Look Up Tables (LUT)
  • Understanding different file formats and compression
  • Capable of applying retimes and repositions to your shots, within the context of your plate and all its elements
  • Integrating multiple different image sources into the final image (colour, exposure contrast, lens effects, depth haze and black levels matching)
  • Premultiplication workflow (RBG and AOV Utility passes)
  • Understanding Image transform filtering (preserving image quality by choosing the right filtering and concatenation settings)
  • Matching lens and camera effects (lens flare, chromatic aberration, lens vignette, halation, focus matching, bloom, matching sensor noise, denoise)
  • Can comfortably build shots from scratch, pick up existing shots and also effectively combine elements from ‘templated’ or ‘modular’ scripts.
  • Good knowledge of 2D tracking techniques (point, planar and vector tracking)
  • Able to extract a green screen or blue screen with clean soft edges and good quality de-spill.
  • Comfortable with the 3D environment in compositing software (handling cameras, geometry, basic shaders, 3D lights, 3D re-rack, 3D projection techniques, basic camera tracking)
  • Understanding the basics of deep compositing (Merge and holdout operations, Deep Colour, Deep Opacity, Deep IDs)
  • Bonus: Creating Templates and Tools, Python Programing

3. Clean Up / Roto

  • Capable of removing objects from plates, such as tracking markers, wire rigs, and set pieces
  • Utilising various compositing skills such as  rotoscoping, painting, tracking, 3D projection to create clean plates being able to extract and clean up the element for use in a shot
  • Create roto mattes that accurately extract an image from its plate and maintain good edge quality and retain the sharpness and/or motion blur of the subject

4. Layers

  • Capable of integrating 2D and CG elements into a final composition
  • Ability to work in the Additive or subtractive way of assembling the CG render using the Arbitrary Output Variables (AOVs) such as diffuse, specular, sub-surface, and light emission.
  • Understanding and using utility render passes such as normals, Point Position, PRef (position reference) PObject, Z Depth, understanding mask channel layers.
  • Bonus: Can comfortably build shots from scratch, pick up existing shots and also effectively combine elements from ‘templated’ or ‘modular’ scripts

5. Lighting

  • Understanding color values and how they relate to color space
  • Capable of matching CG color with plate color, and how to balance highlights and black levels to create a perfectly balanced image
Digital Makeup created by David Michan

Traditional Proficiencies

  • Proficient in using drawing tools such as pencils, pens, and paper.
  • Proficient using painting tools (easels, paintbrushes, paints)

Software Proficiencies

Ability to use one or more of the following software packages:

  • Nuke
  • After Effects
  • Fusion
  • Flame
  • Adobe Photoshop
  • Mocha
  • Silhouette
  • Autodesk Maya
  • Linux OS
  • Bonus: 3D equalizer
  • Bonus: Katana
  • Bonus: Houdini
  • Bonus: Renderman


These skills are equally important in terms of your understanding and ability to do this role. Although they are not skills or knowledge that is officially certified, it will be obvious to recruiters and Certified Digital Artist(CDA) reviewers if you have knowledge in these areas.

Art History

  • Knowledge of Art History
  • Knowledge of Architectural History

Art Fundamentals

  • Perspective
  • Lighting
  • Composition
  • Anatomy
  • Colour Theory
  • Understand the principles of storytelling
  • Film knowledge

Life Skills & Communication

  • Thinking Critically
  • Communication Skills
  • Conflict Management
  • Taking initiative
  • Collaboration
  • Time Management
Compositing by Irene Sanz Martín

Portfolio Projects

Roles in Creative Media & Entertainment industries are quite different to traditional roles. As a Digital Artist, you need to prove your creative and technical abilities which requires an online portfolio filled with projects that showcase your work. The following projects should be included in your digital portfolio to demonstrate your skills and abilities to perform the required skills of this role.

  • Show ability to remove wires, tracking markers, or unwanted elements from a live-action plate. Clearly show the before and after results.
  • Demonstrate ability to work with Blue/Green Screen, specifically being able to integrate an element into a background seamlessly.
  • Integrating CG elements into live-action plates, paying particular attention to all the key skills from tracking, shaders and materials, through to lighting and layers.
  • Demonstrate ability to take a live-action plate with a camera move, track an element into the scene at the correct scale and solid placement.
  • Take an existing live-action plate or reference from a film, then integrate footage of an actor that you have filmed separately. Pay particular attention to matching the lighting and extracting a clean matte.

Apply for your Certified Digital Artist (CDA) Accreditation

Demonstrate your ability to complete entry level tasks required by Creative Media & Entertainment industries.

Not ready yet?

Read our Beginner's Guide to Compositor

Inside you will find everything you need from where to study, what books you should read, how much money you can earn, amazing companies you could work with, and answers to all your other questions.