3D Modeling 3D Modeling Materials & Texturing

Question 1

What does PBR stand for in modern 3D texturing workflows?

Accepted Answer

Physically Based Rendering

Answer

PBR stands for Physically Based Rendering, a shading approach that simulates how light interacts with surfaces in the real world.

Question 2

In a PBR workflow, what does a Metalness map define?

Accepted Answer

Which parts of a surface are metallic versus non-metallic

Answer

A Metalness map uses black-and-white values to distinguish metal (white) from non-metal (black) areas on a surface.

Question 3

What is the primary purpose of a Normal map in 3D texturing?

Accepted Answer

Simulate fine surface detail without adding geometry

Answer

Normal maps encode surface direction data to fake small bumps and details by altering how light hits the surface.

Question 4

What does a Roughness map control in a PBR shader?

Accepted Answer

How sharp or blurry reflections appear on a surface

Answer

The Roughness map controls micro-surface irregularity, where white = rough (blurry reflections) and black = smooth (sharp reflections).

Question 5

What is UV unwrapping in 3D modeling?

Accepted Answer

Flattening a 3D mesh's surface into a 2D coordinate space for texture mapping

Answer

UV unwrapping unfolds a 3D mesh into a flat 2D layout (UV space) so 2D textures can be applied correctly to the surface.

3D Modeling Practice Test