3D Modeling Technology & Digital Applications 4

Question 1

Which compression method is typically used for textures in real-time 3D applications to reduce VRAM usage?

Accepted Answer

BC7 / DXT block compression

Answer

Block compression formats like BC7 (DXT) allow the GPU to sample compressed textures directly without decompressing them, saving VRAM and bandwidth.

Question 2

What is Substance Painter primarily used for in a 3D production pipeline?

Accepted Answer

PBR texture painting directly on 3D models

Answer

Substance Painter by Adobe is a texture-authoring tool that lets artists paint PBR maps (albedo, roughness, metallic, normal) directly on 3D surfaces.

Question 3

Which open standard allows 3D scenes to be embedded and viewed in PDF documents?

Accepted Answer

U3D (Universal 3D)

Answer

The U3D format is supported by Adobe Acrobat/Reader for embedding interactive 3D content directly inside PDF files.

Question 4

In 3D modeling, what does 'HDRI' stand for and how is it used?

Accepted Answer

High Dynamic Range Image — used as a 360° environment light source

Answer

An HDRI is a 360° panoramic image with a wide luminance range that is used to light 3D scenes with realistic, image-based illumination.

Question 5

What is 'retopology' and why is it important in a digital production pipeline?

Accepted Answer

Re-creating a clean, low-polygon mesh over a high-poly sculpt for use in animation or games

Answer

Retopology converts dense sculpted meshes into clean, animation-friendly topology with proper edge flow for deformation and real-time use.

3D Modeling Practice Test

3D Modeling Practice Test

3D Modeling Technology & Digital Applications 4