I wanted to create a simple, square based, pyramid shape and this is easy enough to do.  I used the spline modeler, set the extrusion envelope to symmetric in a plane, created a square shape on the front face, go to the left face and draw the right side points to the center, go to the top face and do the same and viola’, I have a pyramid shape.

The problem is when I render it, I get what is shown above.  The top of the pyramid is in constant shadow.  I looked at the object in the vertex modeler and there are no subdivisions at this point.  What is going on here… and better yet, how do I fix it?