Attached Link: http://freespace.virgin.net/hugo.elias/radiosity/radiosity.htm

Ok back to what I was getting at. Using the link above I decided some time ago to try and repeat the scene in bryce. I only had marginal success with a single light source and actually had to add 2 light at the windows to get more light to "bounce" inside, even using TA. The above picture is a revamp of that scene adding lights as needed to get realistic lighting. Still had trouble with the ceiling without adding lights below the floor not casting any shadows (not included in these renders). Scene consists of 1 sun, 2 radial pinkish lights at the hotspots on the floor, half sphere of light blue radials (about 60 radials or so I think) to simulate the diffuse light from the sky and finally 3 flourescent lights as built in the above tests. This is only the second or so pass, total render time with TA was going to be over 6 days.