Visual Effects Ultimate Visual Effects 2

Question 1

Which compositing technique uses mathematical operations like Add, Multiply, and Screen to blend layers?

Accepted Answer

Blend modes

Answer

Blend modes apply mathematical operations between pixel values of two layers to achieve various composite results.

Question 2

What is 'motion blur' in VFX, and why is it added in post-production?

Accepted Answer

Streaking caused by camera/object movement to enhance realism

Answer

Motion blur replicates the smearing effect of fast movement captured during a camera's shutter open time, making CGI look physically real.

Question 3

In particle systems, what does the 'emitter' control?

Accepted Answer

The origin point, rate, and direction particles are spawned

Answer

The emitter defines where particles are born, how many spawn per frame, and their initial velocity and direction.

Question 4

What does 'hold-out matte' mean in compositing?

Accepted Answer

A matte that punches a hole in a layer to reveal what's behind

Answer

A hold-out matte subtracts or 'cuts out' areas from a layer so underlying layers show through, useful for occlusion.

Question 5

Which rendering technique calculates light bouncing between surfaces to simulate realistic indirect illumination?

Accepted Answer

Global illumination

Answer

Global illumination algorithms like path tracing compute indirect light bounces, producing soft shadows and color bleeding between surfaces.

Visual Effects Practice Test