Visual Effects Visual Effects MCQ 5

Question 1

What is 'subsurface scattering' (SSS) and which type of material most commonly requires it?

Accepted Answer

Light penetrating a translucent surface and scattering internally before exiting; essential for skin, wax, and marble

Answer

SSS simulates light that enters a translucent material, scatters inside, and exits at a different point, giving organic materials like skin their soft glow.

Question 2

In VFX tracking, what is the difference between a '2D track' and a '3D solve'?

Accepted Answer

A 2D track matches position and scale in screen space; a 3D solve reconstructs the actual camera path and scene geometry in 3D space

Answer

2D tracking follows a point's screen-space motion for 2D compositing, while a 3D solve uses many tracks to reconstruct the real-world camera movement.

Question 3

What does 'photogrammetry' allow VFX artists to create from a set of photographs?

Accepted Answer

Accurate 3D geometry and texture maps of real-world objects or environments

Answer

Photogrammetry analyzes overlapping photographs to triangulate surface points and reconstruct a textured 3D model of the subject.

Question 4

What is the 'Dolly Zoom' effect (also called the 'Vertigo effect') and how is it typically recreated in VFX?

Accepted Answer

Physically or digitally zooming the lens out while moving the camera forward (or vice versa) so the subject stays the same size while the background changes perspective

Answer

The Dolly Zoom creates a disorienting perspective shift by counter-moving the zoom and physical camera, achievable digitally by animating field of view and camera position inversely.

Question 5

In cloth simulation, what is a 'constraint' used for?

Accepted Answer

Defining rules that restrict how cloth vertices can move, such as pinning points or collision boundaries

Answer

Constraints lock or restrict specific vertices in the cloth simulation, such as pinning a cape at the shoulders while the rest drapes naturally.

Visual Effects Practice Test

Visual Effects Practice Test

Visual Effects Visual Effects MCQ 5