3D Texturing Technology & Digital Applications 2

Question 1

Which file format is most commonly used for storing HDR environment maps used in 3D texture lighting?

Accepted Answer

.exr

Answer

OpenEXR (.exr) supports 32-bit floating-point data per channel, making it ideal for storing HDR (high dynamic range) environment maps.

Question 2

In Substance Painter, what is the purpose of the 'Baking' step before texturing?

Accepted Answer

Transferring mesh details from a high-poly to a low-poly model

Answer

Baking transfers surface detail (normals, ambient occlusion, curvature) from a high-resolution mesh onto the low-poly model's texture maps.

Question 3

What does the term 'texel density' refer to in 3D texturing?

Accepted Answer

The number of texture pixels per unit of surface area

Answer

Texel density measures how many texture pixels (texels) cover a given unit of surface area, ensuring consistent detail across all objects in a scene.

Question 4

Which GPU-accelerated technique allows 3D applications to display detailed surface textures without adding geometry?

Accepted Answer

Normal mapping

Answer

Normal mapping fakes the appearance of surface detail by altering how light interacts with a surface, without changing actual geometry.

Question 5

In the context of real-time game engines, what is a 'texture atlas'?

Accepted Answer

A single large texture sheet combining multiple smaller textures

Answer

A texture atlas packs multiple textures into one image to reduce draw calls and improve rendering performance in real-time engines.

3D Texturing Practice Test