I think I did this one in Lightwave. I'm a sucker for geometrical shapes, glass and chessboards.. And I wanted to screw around with glass textures (reflection, refraction. whee). I remember it taking forever to render one frame. So I cancelled it at about 1/4 of the entire movie, and decided to 'ping-pong' the frames I had. That's why the animation is a bit silly, heh. But, it's all I have left of it.