Ray Dream doesn't do that kind of light automatically, but you can fake it! The most common way is create a texture with light and dark spots in the pattern you want and then use a strategically placed spot light with the texture as a gell. Good Luck, Eric Winemiller Digital Carvers Guild Freeware and commercial 3D extensions http://digitalcarversguild.com

Eric Winemiller
Digital Carvers Guild
Carrara and LightWave plug-ins