3D Texturing Texture Baking & Rendering 2

Question 1

What is the primary purpose of a lightmap in real-time 3D rendering?

Accepted Answer

Pre-bake static lighting data into a texture for efficient real-time use

Answer

Store UV layout information across multiple UDIM tiles

Answer

Define color temperature values for dynamic scene lights

Answer

Map HDR environment values onto material roughness properties

Question 2

What information does a thickness map store when baked from a mesh?

Accepted Answer

The distance from one surface of the mesh through to the opposite surface

Answer

The height variation of surface microbumps for displacement

Answer

The glossiness at each surface point derived from roughness data

Answer

The edge sharpness between adjacent UV chart boundaries

Question 3

What is the primary use of a curvature map in a PBR texturing workflow?

Accepted Answer

Driving wear effects, edge highlights, and cavity darkening procedurally

Answer

Controlling UV stretching in concave mesh regions

Answer

Storing directional light data for runtime global illumination

Answer

Mapping vertex normals to world-space coordinates for export

Question 4

In Marmoset Toolbag's baking panel, what do the 'Max Frontal Distance' and 'Max Rear Distance' settings control?

Accepted Answer

How far projection rays extend forward and backward from the low-poly surface

Answer

The maximum UV chart size permitted per island in the bake

Answer

The output texture resolution limits for the baked maps

Answer

The polygon budget enforced on the high-poly input mesh

Question 5

Why is padding (also called dilation or bleed) added around UV islands in a baked texture?

Accepted Answer

To prevent visible seam artifacts at island edges during mip-mapping and filtering

Answer

To increase the total UV space available for island placement

Answer

To add gradient borders used in post-processing compositing

Answer

To automatically merge overlapping UV islands in the layout

Question 6

Which baking pass produces a grayscale map where concave areas like crevices and corners appear darker?

Accepted Answer

Ambient Occlusion map

Answer

Curvature map

Answer

Normal map

Answer

Position map

Question 7

Which map type stores directional lighting information that allows a surface to be relit after the bake is complete?

Accepted Answer

Directional lightmap (dominant light direction map)

Answer

Albedo map

Answer

Roughness map

Answer

Height map