Game Art Game Texturing and Materials 1 — Questions and Answers
Question 1: What does PBR stand for in game art texturing?
- Pixel-Based Rendering
- Physically Based Rendering (Correct answer)
- Pre-Baked Reflection
- Procedural Brush Rendering
Correct answer: Physically Based Rendering
PBR (Physically Based Rendering) is a texturing workflow that simulates how light interacts with surfaces based on real-world physical properties.
Question 2: In a PBR metallic-roughness workflow, what does a roughness value of 0 represent?
- A completely matte, diffuse surface
- A perfectly smooth, mirror-like surface (Correct answer)
- A transparent material
- A highly emissive surface
Correct answer: A perfectly smooth, mirror-like surface
A roughness value of 0 means the surface is perfectly smooth, reflecting light in a single sharp direction like a mirror.
Question 3: What is a 'texture atlas' in game development?
- A document listing all texture file names in a project
- A single texture image that contains multiple individual textures packed together (Correct answer)
- A 3D reference sphere used to check material quality
- A UV layout that tiles seamlessly
Correct answer: A single texture image that contains multiple individual textures packed together
A texture atlas packs multiple textures into one image to reduce draw calls and improve GPU performance.
Question 4: What information does the 'metallic map' store in a PBR workflow?
- Specular highlight color
- Whether a surface area is metallic (white) or non-metallic (black) (Correct answer)
- The roughness of metal surfaces only
- Normal direction for metallic geometry
Correct answer: Whether a surface area is metallic (white) or non-metallic (black)
The metallic map is a grayscale map where white values indicate metallic surfaces and black indicates dielectric (non-metallic) surfaces.
Question 5: What is UV unwrapping in game art?
- Removing vertex normals from a mesh
- Flattening a 3D mesh's surface into a 2D layout so textures can be applied correctly (Correct answer)
- Baking ambient occlusion onto a model
- Applying a tiling material to a surface in the engine
Correct answer: Flattening a 3D mesh's surface into a 2D layout so textures can be applied correctly
UV unwrapping projects a 3D mesh's surface into 2D space so texture maps can be painted and applied without distortion.
Question 6: What is a 'texel density' and why does it matter in game texturing?
- The resolution of the normal map relative to the albedo map
- The number of texture pixels per unit of world space, used to ensure visual consistency across assets (Correct answer)
- The color depth of a texture file
- The number of UV islands on a texture sheet
Correct answer: The number of texture pixels per unit of world space, used to ensure visual consistency across assets
Texel density measures how many texture pixels cover a given surface area, keeping all assets looking consistent when viewed together.
Game Art Game Texturing and Materials 1
What does PBR stand for in game art texturing?