CompuServe Messages

Scott, don't extrude an object that has faces already defined. I have noted that the triangles on the faces sometimes get mangled and cause missing areas like you describe. You're better off making the outline of the rectangle, copying it and setting it aside, extrude the original outline, fill in the faces on the copy and position it in front and behind your extrude. When you've done this, join the three objects. It's a little cumbersome, but you end up with a simpler object and a lot less room for error.