3D Texturing Quality Control & Assurance 3

Question 1

Which file format is preferred for delivering 8-bit diffuse/albedo textures in a game pipeline due to its lossless compression and alpha support?

Accepted Answer

PNG

Answer

PNG provides lossless compression and supports an alpha channel, making it the standard for 8-bit albedo deliveries in game pipelines.

Question 2

A texture set passes individual map reviews but looks incorrect assembled in engine. Which QA step would catch this earliest?

Accepted Answer

Assembling a material ball in the target renderer and doing a full-lighting pass

Answer

Assembling a material ball in the target renderer shows how all maps interact together under real lighting conditions, catching cross-map issues.

Question 3

In PBR pipelines, why must normal maps be saved in a linear color space rather than sRGB?

Accepted Answer

Normal maps store direction vectors, not color, so gamma correction would distort the shading

Answer

Normal maps encode XYZ direction vectors; applying gamma correction would mathematically alter the vectors and produce incorrect surface shading.

Question 4

During texture QA, a reviewer identifies 'boiling' in a tiling texture when the camera moves. What causes this artifact?

Accepted Answer

Incorrect mip map generation or missing mipmaps

Answer

Boiling or shimmering during camera movement is caused by incorrect or missing mipmaps, which cause aliasing as the texture is sampled at different distances.

Question 5

What is the purpose of a 'texture budget' in game production QA?

Accepted Answer

To ensure total VRAM usage from textures stays within hardware limits

Answer

A texture budget caps total VRAM usage to ensure the game runs within the memory constraints of the target hardware without stuttering or crashes.

3D Texturing Practice Test

3D Texturing Practice Test

3D Texturing Quality Control & Assurance 3