I'm developing a 3D lighting design software for professional lighting designer that utilizes OpenGL rather heavily. (http://www.capturesweden.com, we're listed att opengl.org as well).
The problem is performance. On my dual P3-500 FireGL (Radeon 7800) everything works very great, it worked fine with my GeForce (1) card as well, though not as smooth in full screen.. ;-) However.. when you switch to just about any laptop it's usually a catastrophy.
The OpenGL code uses stencil (for multipass), depth and alpha buffers and a 24-bit color depth. The bottleneck in a desktop computer is always the CPU and the bottleneck in a laptop is always (so far) the GPU. I'm aware that most users don't have highend GPU's in their laptops, but the huge difference in performance seems rather strange to me anyway.
Any spotaneous comments?
Looking forward to your help.. :-)