Visual Effects Vocabulary 4

Question 1

In compositing, what is 'color spill' and why is it a problem?

Accepted Answer

Unwanted reflection of green or blue screen color onto a subject, making clean keying difficult

Answer

Color spill occurs when the colored light from a green or blue screen reflects onto the subject, contaminating edges and skin with an unnatural tint that must be corrected.

Question 2

What is a 'render farm' in VFX production?

Accepted Answer

A networked cluster of computers that distribute and process rendering tasks in parallel

Answer

A render farm is a large network of computers that collectively process rendering jobs, drastically reducing the time needed to produce complex animated frames.

Question 3

What does the term 'deep compositing' refer to?

Accepted Answer

A compositing method where each pixel stores depth and opacity data at multiple depth layers

Answer

Deep compositing stores per-pixel depth and opacity information at multiple depths, enabling accurate compositing of volumes, particles, and overlapping transparent elements.

Question 4

In particle systems, what is 'emission rate'?

Accepted Answer

The number of particles spawned per unit of time from an emitter

Answer

Emission rate controls how many particles are created per second (or per frame), directly affecting the density and volume of a particle effect.

Question 5

What does 'lens distortion' mean in VFX tracking and compositing?

Accepted Answer

The visual warping or bowing of the image caused by the physical properties of a camera lens

Answer

Lens distortion is the geometric warping introduced by real camera lenses, which must be accounted for in tracking and compositing to correctly align CG elements.

Visual Effects Practice Test

Visual Effects Practice Test

Visual Effects Vocabulary 4