Performer provides explicit support for both alpha blending and geomorphing.
Each facet is a list of indices referring to the sequence of points. Shared edges must be derived implicitly from the points shared by facets. However, they cannot represent holes in facets. Consider a very simple Open Inventor program which constructs a scene graph composed of a camera node, a light node, a material node and a cone node. Running this program, we see a window with a red cone drawn in the render area.