3D Modeling 3D Modeling Materials & Texturing 1 — Questions and Answers
Question 1: What does PBR stand for in modern 3D texturing workflows?
- Pixel-Based Rendering
- Physically Based Rendering (Correct answer)
- Procedural Bitmap Resolution
- Pre-Built Rig
Correct answer: Physically Based Rendering
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?
- The shininess of a surface
- Which parts of a surface are metallic versus non-metallic (Correct answer)
- The surface's height details
- The color of reflections
Correct answer: Which parts of a surface are metallic versus non-metallic
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?
- Define surface color
- Simulate fine surface detail without adding geometry (Correct answer)
- Control transparency
- Set emission intensity
Correct answer: Simulate fine surface detail without adding geometry
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?
- Surface displacement height
- How sharp or blurry reflections appear on a surface (Correct answer)
- Ambient occlusion shadows
- Subsurface scattering depth
Correct answer: How sharp or blurry reflections appear on a surface
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?
- Applying cloth simulation to a mesh
- Flattening a 3D mesh's surface into a 2D coordinate space for texture mapping (Correct answer)
- Removing subdivision levels
- Baking ambient occlusion
Correct answer: Flattening a 3D mesh's surface into a 2D coordinate space for texture mapping
UV unwrapping unfolds a 3D mesh into a flat 2D layout (UV space) so 2D textures can be applied correctly to the surface.
Question 6: What does an Ambient Occlusion (AO) map represent?
- Surface reflectivity
- Areas where ambient light is occluded or blocked by nearby geometry (Correct answer)
- Emissive light output
- Texture color saturation
Correct answer: Areas where ambient light is occluded or blocked by nearby geometry
An AO map stores soft shadows in crevices and corners where ambient light is less likely to reach, adding depth to surfaces.
3D Modeling 3D Modeling Materials & Texturing 1
What does PBR stand for in modern 3D texturing workflows?