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3D Texturing Flashcards

7 cards from real 3D Texturing practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the primary advantage of using UDIM tiles in a professional 3D texturing pipeline?

    Answer: They allow a single mesh to use multiple high-resolution texture pages

    UDIM tiles let artists extend UV space beyond a single 0-1 tile, enabling very high effective texture resolution for complex hero assets using multiple texture pages.

  2. Which type of map simulates depth on a flat surface by offsetting UV coordinates based on a height map?

    Answer: Parallax occlusion map

    A parallax occlusion map (POM) shifts UV coordinates per pixel based on a height map to create the illusion of depth, including self-occlusion, without adding geometry.

  3. When baking a high-poly mesh onto a low-poly mesh, what does the 'cage' serve as?

    Answer: A projection envelope that controls the ray-casting distance and direction

    The cage is an inflated version of the low-poly mesh that defines the ray-casting envelope, ensuring rays from the low-poly hit the correct areas on the high-poly surface.

  4. What does 'channel packing' accomplish in a game-ready texture workflow?

    Answer: Stores multiple grayscale maps in the R, G, and B channels of one texture to save memory

    Channel packing places independent grayscale maps (e.g., roughness, metallic, AO) into the separate RGB channels of one texture file, reducing texture sample count and memory usage.

  5. In Substance Designer, what is a 'pixel processor' node used for?

    Answer: Executing a custom GLSL/HLSL shader per pixel to generate procedural textures

    The pixel processor node in Substance Designer lets artists write custom shader code that is executed per pixel, enabling fully custom procedural texture generation.

  6. What problem does 'dilation' (also called padding or bleeding) solve in a texture atlas?

    Answer: It extends the colors at UV island edges to prevent dark seams from appearing due to bilinear filtering

    Dilation fills the empty areas just outside UV island borders with the island's edge colors, preventing bilinear texture filtering from sampling black empty space and creating visible seams.

  7. Which texture compression format is commonly used on iOS devices for its hardware-accelerated support?

    Answer: PVRTC

    PVRTC (PowerVR Texture Compression) is the legacy hardware-accelerated compression format native to Apple's PowerVR GPUs found in older iOS devices, though ASTC is now preferred on modern hardware.