3D Modeling and Geometry Flashcards
7 cards from real 3D Product Animation 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 Modeling and Geometry flashcards as text
Which polygon type is considered the most stable and preferred for clean topology in 3D product modeling?
Answer: Quads (quadrilaterals)
Quads deform predictably during subdivision and animation, making them the industry standard for clean, animation-ready topology.
What is 'edge looping' primarily used for in 3D product modeling?
Answer: Controlling mesh density and supporting smooth surface curvature
Edge loops define the flow of geometry across a surface, controlling density and supporting smooth curves especially around curved product features.
In 3D modeling, what does 'subdivision surface' (SubD) modeling do to a mesh?
Answer: Adds more polygons by splitting existing faces to create smooth surfaces
Subdivision surfaces iteratively split polygons to generate a smoother, higher-resolution mesh from a lower-resolution cage model.
What is the primary purpose of a 'support edge' (also called a holding edge) in SubD modeling for product animation?
Answer: To keep sharp corners defined after subdivision
Support edges are placed close to a corner or crease so that subdivision algorithms maintain the sharpness of that edge rather than rounding it.
Which modeling technique builds 3D shapes by extruding and manipulating a 2D profile along a path, commonly used for bottles and cylindrical products?
Answer: Lathe/Revolve modeling
Lathe or revolve modeling spins a 2D profile curve around an axis to generate a symmetrical 3D form, ideal for bottles, jars, and rotational products.
What is a 'manifold mesh' in the context of 3D product modeling?
Answer: A watertight mesh where every edge is shared by exactly two faces
A manifold mesh has no holes, no non-manifold edges, and each edge connects exactly two faces, making it valid for subdivision, 3D printing, and reliable rendering.
In 3D software like Blender or Maya, what does the term 'vertex normal' refer to?
Answer: The average direction perpendicular to the faces around a vertex, used to control shading smoothness
Vertex normals are interpolated direction vectors at each vertex that tell the renderer how to shade a surface smoothly or sharply across face boundaries.