ACA 3D Modeling and Visualization 2 — Questions and Answers
Question 1: In 3ds Max, which modifier smooths a low-poly mesh by subdividing faces and rounding edges?
- TurboSmooth (Correct answer)
- Bend
- Shell
- Lattice
Correct answer: TurboSmooth
TurboSmooth subdivides geometry and rounds corners, which gives a smoother surface.
Question 2: Which polygon component in Maya is defined by exactly two vertices?
- Face
- Edge (Correct answer)
- UV
- Normal
Correct answer: Edge
An edge is the line segment that connects two vertices.
Question 3: A modeler needs a hollow cup from a solid cylinder. Which 3ds Max modifier adds thickness to a surface with an open top?
- Extrude
- Taper
- Shell (Correct answer)
- Twist
Correct answer: Shell
Shell adds inner or outer thickness to a surface, which makes it a solid object with walls.
Question 4: What does the term 'n-gon' mean in polygon modeling?
- A polygon with three sides
- A polygon with four sides
- A polygon with zero area
- A polygon with more than four sides (Correct answer)
Correct answer: A polygon with more than four sides
An n-gon is a face with five or more sides, and it can cause shading and subdivision artifacts.
Question 5: In Maya, which tool cuts a new edge loop all the way around a mesh?
- Insert Edge Loop (Correct answer)
- Bevel
- Bridge
- Merge Vertices
Correct answer: Insert Edge Loop
Insert Edge Loop adds a continuous loop of edges across connected quads.
Question 6: Which type of geometry is defined by mathematical curves and gives smooth surfaces at any resolution?
- Polygon mesh
- NURBS (Correct answer)
- Voxel
- Point cloud
Correct answer: NURBS
NURBS surfaces come from control curves, so they stay smooth at any tessellation level.
Question 7: Why do animators usually prefer quad-based topology for characters?
- Quads render faster than triangles in all engines
- Quads cannot be textured
- Quads subdivide and deform predictably (Correct answer)
- Quads remove the need for UVs
Correct answer: Quads subdivide and deform predictably
Clean quad edge flow subdivides evenly and bends cleanly at joints.
ACA 3D Modeling and Visualization 2
In 3ds Max, which modifier smooths a low-poly mesh by subdividing faces and rounding edges?