Hemisphere Primitive
Available parameters:
Name,
Number of meridians: number of tessellated divisions running from pole to pole. The poles are aligned to the Y axis.
Number of parallels: number of tessellated divisions wrapping around the sphere. These are parallel to the XZ plane.
Main radius: radius of the corresponding sphere. Consequently, this is also the height of the hemisphere.
Edge radius: radius of the bottom edge of the hemisphere. This dimension must be smaller than the main radius. This creates a rounded bottom edge, which improves visual quality when the hemisphere is used as a skydome.
A hemisphere is always automatically positioned on the XZ plane usually used for defining the ground of the 3D scene.