Visual Effects 3D CGI and Rendering 2

Question 1

What is 'ambient occlusion' (AO) in 3D rendering?

Accepted Answer

A shading method that approximates how much ambient light reaches a surface point

Answer

Ambient occlusion approximates the darkening that occurs in crevices, corners, and areas where objects are close together and ambient light is blocked.

Question 2

In VFX, what does 'rigging' a 3D character mean?

Accepted Answer

Creating a skeleton and control system that animators use to pose and animate the character

Answer

Rigging involves building a skeleton (bones/joints) and control rig inside a 3D character model so animators can manipulate it to create realistic poses and movement.

Question 3

What is 'displacement mapping' in 3D VFX?

Accepted Answer

Using a grayscale texture to physically deform the geometry of a surface

Answer

Displacement mapping uses a grayscale image to actually push and pull the vertices of a mesh, creating real geometric detail like rock texture or skin pores.

Question 4

What is a 'render farm' used for in VFX production?

Accepted Answer

A network of computers that distribute and process rendering jobs in parallel

Answer

A render farm is a cluster of networked computers that work simultaneously on rendering tasks, dramatically reducing the time needed to render complex VFX sequences.

Question 5

What is 'motion blur' in 3D rendering and why is it important for VFX?

Accepted Answer

The blurring of fast-moving objects that mimics how a real camera captures motion

Answer

Motion blur simulates the smearing of fast-moving objects that occurs with real camera shutter exposure, making CGI elements look naturally integrated with live-action footage.

Visual Effects Practice Test

Visual Effects Practice Test

Visual Effects 3D CGI and Rendering 2