Pyramid
From Netfabb Wiki
A pyramid is a primitive body characterized by a base surface with straight edges and an apex, which is exactly above the center of the base. Each base edge has the same length and each angle of the base is identical. The base edges and the apex form identical triangles.
Options:
Setting:  Function:  Preview: 

Corners  Number of corners of the base  
Height  Height of the apex  
Radius  Distance from the center of the base to its corners  
Thickness  Wall thickness. This is only relevant for hollow pyramids  
Part  Solid: Creates a solid pyramid Hollow: The base of the pyramid is opened 

Refine Triangle Mesh  This determines the number of triangles used. With the default setting, netfabb uses only as much triangles as necessary to generate the right shape. In case of the walls of the pyramid, this is only one triangle per wall. With each subsequent level of refinement, each triangle is split into four. 