Check This Out..

Take a look, I just started learning some OpenGL stuff. I've been working on this cool shadow technique thing that I thought was kind'a cool.

Not really sure if you'd call color interpolation a "shadow technique", but nice none the less =)

Looks nice. However this is a pretty simple shading technique. Nothing is casting a shadow really. The "dark" part of your cube is static and never changes. Basically your assigning the vertex color black to one of your tri verts and interpolating to white on the other two. OpenGL is nice enough to do this with either Phong or Gouraud shading. I imagine you are using Gouraud. Looks nice however.

EDIT:

Probably get more feedback over there in the Game Programming forum also.

Thanks for 'da feedback, I know what you're saying. But I figured It was someone looking around it... not an object spinning. :D