3D Texturing 3D Texturing Materials & Surface Properties

Question 1

In a PBR metallic-roughness workflow, what does a metallic value of 1.0 indicate?

Accepted Answer

The surface is a pure metal and reflects light according to Fresnel equations

Answer

The surface is completely rough with no reflections

Answer

The surface has a subsurface scattering effect

Answer

The surface is fully transparent

Question 2

What does a roughness value of 0.0 produce on a PBR surface?

Accepted Answer

A perfectly mirror-like, sharp specular reflection

Answer

A completely diffuse, matte surface

Answer

Maximum subsurface scattering

Answer

A fully opaque surface with no highlights

Question 3

What is the purpose of an Ambient Occlusion (AO) map in a PBR material?

Accepted Answer

To add soft shadowing in crevices and contact areas that simulates indirect light occlusion

Answer

To define which parts of the surface are metallic

Answer

To store the surface normal direction for lighting calculations

Answer

To control the transparency of the material

Question 4

What is Subsurface Scattering (SSS) used for in 3D materials?

Accepted Answer

Simulating light that penetrates and scatters beneath the surface of translucent materials like skin or wax

Answer

Generating normal maps from displacement data

Answer

Creating reflective surfaces like mirrors

Answer

Tiling textures seamlessly across large surfaces

Question 5

In PBR materials, what is the F0 (Fresnel zero) value used to define?

Accepted Answer

The base specular reflectivity of a non-metallic surface at a 0-degree viewing angle

Answer

The roughness at zero viewing angle

Answer

The metallic intensity at grazing angles

Answer

The UV tiling frequency

Question 6

What is a 'cavity map' used for in texturing?

Accepted Answer

Darkening fine surface recesses and micro-crevices to add micro-detail depth

Answer

Defining large-scale surface transparency

Answer

Storing vertex color data

Answer

Baking per-pixel lighting from a point light