Nachbrenner

Good idea.

Here are some more borked apps to fool around with:

Real-Time Global Illumination on GPUs
"OpenGL version, uses vendor-specific extensions and hence will only run on ATI cards." ... Vineet Goel, ATI Research - well, not on mine
Journal of Graphics Tools - Papers - Real-Time Global Illumination on GPUs
RadiosGLView
RadiosGL: OpenGL Radiosity Renderer and Viewer
rtrad_v1_0
Real-Time Radiosity

And a D3D app telling me "GPU requirements not met for high quality... try Geforce for better quality"
Realtime Radiosity Demo - v1.1
Lionel Berenguier - Realtime Radiosity on GPU



also, check out:
Slow glRenderMode ( GL_SELECT ) Performance in Recent Graphics Drivers - Rage3D Discussion Area