quote:
Most profesionals (that I know) get away with solutions that researchers might consider 'hacky' but give far more controllable results.
Radiosity itself is already a huge hack, no need to make it even worse using hemicubes. Hemicubes are totally uncontrollable, that's exactly the problem. If you use a radiosity solution, that computes formfactors by tracing them, you can be pretty certain to get a good result. You can't, if you use hemicubes - you'll always have to run tests first. Are there any aliasing problems, resolution issues, etc.
Now running tests and using hacked algorithms might be OK for small scale scenes - but it is not for the type of scenes we use. Our current project uses over 580 million faces. And we need a predictable radiosity solution that will work. We rent processing time on a massive parallel cluster to compute it, and it has to work without tricks and hacks. If the outcoming radiosity solution isn't exactly as expected, we lose several $100K. And since our goal is maximum photorealism (with exact lightflow simulation), there is no way around radiosity.
And BTW: Lightscape is used by lots of high profile architectural/design firms, to get photorealistic renderings. It's quality is absolutely top-notch, I'm not aware of any other software delivering renderings of that quality. The only (big) drawback is the computation time. That's why we use inhouse software instead.
/ Yann
[edited by - Yann L on August 1, 2002 10:22:01 PM]