These polygons are placed together to create a three-dimensional mesh, which produces a 3D image. While most polygons are triangles (which have the fewest possible sides), they can also be rectangles, hexagons, or other shapes. ... So the more polygons a 3D model has, the more smooth and realistic it will look.

Is a cube a polygon?

No, a cube is not a polygon. A cube is a 3-dimensional, solid figure. A polygon must be a flat, plane figure made up on line segments.

Is 3D a simplest polygon?

Three vertices, connected to each other by three edges, define a triangle, which is the simplest polygon in Euclidean space.