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Quality Control & Assurance Flashcards

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

Read the first 7 Quality Control & Assurance flashcards as text

  1. What is the purpose of a 'proxy mesh' or 'stand-in mesh' in a production QA workflow?

    Answer: A simplified placeholder used for collision, physics, or scene layout testing before the final mesh is complete

    Proxy meshes allow other departments (animation, layout, engineering) to work while the final high-quality asset is still being refined.

  2. Why should hidden or invisible geometry be removed before final delivery of a 3D asset?

    Answer: It adds unnecessary file size, draw calls, and can cause physics or collision errors

    Hidden geometry still consumes memory and processing resources, and can interfere with collision detection and physics simulation.

  3. What artifact occurs when two co-planar faces occupy the same space in a 3D scene?

    Answer: Z-fighting

    Z-fighting causes flickering between two faces because the depth buffer cannot determine which is in front.

  4. During QA, a model's bounding box is significantly larger than the visible mesh. What likely caused this?

    Answer: Stray vertices or geometry outside the main mesh

    Stray vertices far from the mesh inflate the bounding box, affecting culling, physics bounds, and asset placement.

  5. What is a 'LOD chain' and why is it validated during asset QA?

    Answer: A set of progressively lower-polygon versions of a mesh used at increasing distances

    LOD chains reduce GPU load for distant objects; QA validation ensures each LOD transitions smoothly without visible popping.

  6. Which UV quality issue causes textures to appear blurry on certain parts of a model despite a high-resolution texture?

    Answer: Uneven UV island density (texel density mismatch)

    If UV islands are different sizes relative to their real-world surface area, some areas receive fewer texels per unit and appear blurry.

  7. A game engine reports a model has too many draw calls. Which QA action would most directly reduce draw calls?

    Answer: Combine separate mesh objects and merge materials where possible

    Each mesh object and material typically generates its own draw call, so merging objects and atlasing materials reduces the total.