PBR Texture Maps for Real-Time 3D Assets

Auto audio on: the next questions will be read aloud when you click Continue.

1. 1

   What information should a base-color map contain in a metalness-based PBR workflow?

   A Direct lighting, cast shadows, and specular highlights B The surface color without baked lighting or reflections C Only the depth and orientation of surface details
2. 2

   Which metalness value normally represents a pure dielectric material such as plastic, wood, or ceramic?

   A 0 B 0.5 C 1
3. 3

   Two spheres have identical lighting and base color. In the image, which sphere has the higher roughness?

   

   A The right sphere B Both have equal roughness C The left sphere
4. 4

   What does a tangent-space normal map primarily modify during rendering?

   A The actual silhouette and vertex positions of the mesh B The surface normals used for lighting calculations C The physical scale of the texture coordinates
5. 5

   Which RGB value is approximately neutral for a flat area in a tangent-space normal map?

   

   A 128, 128, 255 B 128, 255, 128 C 255, 128, 128
6. 6

   Why should roughness and metalness maps usually be interpreted as linear data rather than sRGB color data?

   A Linear interpretation automatically increases texture resolution B Linear interpretation converts grayscale maps into vector maps C Their pixel values represent numeric material parameters that should not receive gamma correction
7. 7

   What is the main purpose of an ambient occlusion map in a real-time PBR material?

   A To approximate reduced indirect light in crevices and enclosed areas B To define whether each pixel is metallic C To control the sharpness of direct reflections
8. 8

   What is a common performance benefit of packing roughness, metalness, and ambient occlusion into separate channels of one RGB texture?

   

   A It increases the polygon count available to the model B It can reduce the number of texture resources and samples required C It eliminates the need for UV coordinates
9. 9

   In the image, checker squares appear much smaller on the model's handle than on its body. What does this most directly indicate?

   

   A The handle has reversed surface normals B The body uses an incorrect metalness value C The model has inconsistent texel density
10. 10

    What is the primary function of a cage when baking a normal map from a high-poly model to a low-poly model?

    

    A To define the projection envelope and guide rays toward the high-poly surface B To add padding between UV islands in the exported texture C To convert the normal map into the sRGB color space
11. 11

    A tangent-space normal map makes dents look like bumps after being moved between software that uses OpenGL and DirectX conventions. Which channel usually needs to be inverted?

    A Red, representing the X direction B Green, representing the Y direction C Blue, representing the Z direction