Blender 2.5 Indirect Lighting test with some balls falling down the stairs.
Using simulation and glowing balls.
The file was used to create this video : http://vimeo.com/12609341
More information on indirect lightning can be found on this blogpost : http://oenvoyage.wordpress.com/2010/06/16/indirect-lighting-test/
well, i realised i had stolen your idea. subconsciously, believe it or not. http://www.youtube.com/watch?v=pQYN8n1LIjA