The first scene demonstrates a moving mesh light flying over the city scene from the previous post. Mesh lights are a notorious source of noise in path tracing, but Brigade handles them pretty nicely (all videos and screenshots rendered with 2 GTX 580 GPUs) :
850k triangles rendered at 10-30 fps and 1280x720p render resolution:
http://www.youtube.com/watch?v=8__UhcVRDeI (be sure to watch this at 720p)
UPDATE: video with sun
These tests undeniably show that real-time high-res path tracing of highly detailed and complex scenes is possible today using just one or two GPUs. This is a major breakthrough and very hard to believe, most people were thinking this would be at least 10 years away. To be honest, I have a hard time believing it as well. I'm constantly OMGWTF when loading up a new model and seeing it in all its path traced glory :-)
Stay tuned for my next blogpost, in which I will show a highly detailed modern city.