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3D Modeling 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.

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  1. What does 'procedural modeling' mean in 3D software like Houdini or Blender's geometry nodes?

    Answer: Generating geometry through node-based rules and parameters rather than direct editing

    Procedural modeling uses algorithms and node graphs to generate geometry programmatically, allowing non-destructive and easily adjustable workflows.

  2. In 3D modeling, what is a 'Boolean operation'?

    Answer: An operation that combines or subtracts volumes between two overlapping meshes

    Boolean operations (union, difference, intersection) use set logic to merge or cut shapes, similar to adding or subtracting volumes.

  3. What is 'displacement mapping' and how does it differ from normal mapping?

    Answer: Displacement mapping physically moves vertices based on a texture, while normal mapping only fakes surface detail

    Displacement maps actually modify the mesh geometry at render time, producing real silhouette detail, while normal maps are an illusion affecting only shading.

  4. What does 'non-destructive workflow' mean in 3D modeling software?

    Answer: Edits are applied through modifiers or layers that can be adjusted or removed without permanently altering the base mesh

    Non-destructive workflows use modifier stacks or node graphs so changes remain editable and reversible at any point in the production process.

  5. In PBR (Physically Based Rendering) materials, what does the 'metallic' map control?

    Answer: Whether a surface behaves as a metal (conductive) or a dielectric (non-metal)

    The metallic map defines which areas of a surface are conductors (metals), fundamentally changing how diffuse and specular light are calculated.

  6. What is the purpose of 'smooth shading' versus 'flat shading' on a polygon mesh?

    Answer: Smooth shading interpolates vertex normals across faces to give the illusion of a curved surface

    Smooth shading interpolates normals between vertices so each face blends into the next, hiding faceting without adding polygons.

  7. What is the role of a 'pivot point' (or origin) in 3D modeling?

    Answer: It is the reference point around which transformations like rotation and scaling occur

    The pivot point acts as the local coordinate origin; all rotations and scale operations happen relative to this point.