Visual Effects 3D CGI and Rendering 3

Question 1

What does 'photogrammetry' mean in VFX asset production?

Accepted Answer

Reconstructing a 3D model from multiple photographs of a real-world object

Answer

Photogrammetry uses multiple overlapping photographs of a real object or environment to automatically reconstruct an accurate 3D model with real-world texture detail.

Question 2

What is the purpose of a 'normal map' in VFX and game rendering?

Accepted Answer

A texture that stores surface orientation data to simulate fine detail in lighting without extra geometry

Answer

A normal map stores surface orientation information as color data, tricking the renderer into lighting a surface as if it has fine geometric detail that doesn't actually exist in the mesh.

Question 3

What is 'hair simulation' technology in VFX used for?

Accepted Answer

Simulating the dynamics of individual hair or fur strands responding to gravity, wind, and collisions

Answer

Hair simulation uses physics-based solvers to calculate how thousands or millions of individual hair or fur strands move dynamically in response to forces like gravity, wind, and character motion.

Question 4

What is 'PBR' (Physically Based Rendering) in modern VFX and game pipelines?

Accepted Answer

A rendering approach where material properties are based on real-world physical values for consistent results

Answer

PBR uses physically accurate material properties (roughness, metalness, base color) that behave consistently under any lighting condition, making it easier to create realistic-looking materials.

Question 5

What is a 'proxy' in a 3D VFX workflow?

Accepted Answer

A lower-resolution stand-in version of an asset used during animation and previsualization

Answer

A proxy is a simplified, low-polygon or low-resolution version of a complex 3D asset used during animation and layout stages to keep the scene responsive before final high-quality assets are swapped in.

Visual Effects Practice Test

Visual Effects Practice Test

Visual Effects 3D CGI and Rendering 3