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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.

Read the first 7 3D Texturing flashcards as text

  1. What is the difference between a 'trim sheet' and a texture atlas in game asset production?

    Answer: A trim sheet contains a set of reusable modular detail strips applied to model edges, while an atlas groups unique textures for separate objects

    Trim sheets are tileable or segmented texture sheets designed to be mapped along edges and surfaces for efficient re-use, while atlases pack unique textures for multiple distinct objects.

  2. When using a specular-glossiness PBR workflow (as opposed to metallic-roughness), what does the specular map control?

    Answer: The intensity and color of specular reflections directly

    In specular-glossiness workflows, the specular map directly defines the reflectance color and intensity at 0° incidence (F0), offering fine-grained control over both conductors and dielectrics.

  3. What is 'texture streaming' in a real-time 3D engine?

    Answer: Dynamically loading and unloading mipmap levels based on camera distance to manage GPU memory

    Texture streaming loads only the mipmap levels appropriate for the current camera distance, keeping high-resolution mips only for close-up objects to stay within GPU memory budgets.

  4. In a tangent-space normal map, what color represents a surface normal pointing straight out (perpendicular to the surface)?

    Answer: Flat blue-purple (128, 128, 255)

    A tangent-space normal map encodes the X and Y perturbations in red and green, and a flat normal (pointing straight out) maps to 128, 128 in those channels and 255 in blue.

  5. What is 'albedo' in a physically-based rendering material?

    Answer: The base color of the surface without any lighting, shadow, or specular information

    Albedo (also called base color) is the raw inherent color of a surface with no baked-in lighting information, allowing the renderer to apply lighting mathematically.

  6. Which UV projection method is best suited for texturing a terrain with minimal distortion across large flat areas?

    Answer: Planar projection

    Planar projection casts UV coordinates straight down onto a mostly flat terrain, resulting in minimal distortion across the horizontal surface.

  7. What is the purpose of an 'ID map' (also called a color ID map) in a texturing workflow?

    Answer: To mask different material regions on a single mesh using distinct solid colors for selection

    An ID map uses flat, distinct colors to identify separate material zones on a mesh, allowing texturing tools to auto-mask selections for applying different materials to each zone.