This is a demo I made to test the KOS OpenGL implementation for the Sega Dreamcast.
The program displays a spinning swirly thing in the background on top of which it shows 1 of 5 textured objects. There is also music on this demo.
Control pad buttons A and B cycle through the objects. Each object spins in the centre of the screen when it has been selected.
I created the objects using my own 2d profile editor and volume sweep utilities – see image: