Hi ... haven't been here for a while I found in my stock a Mirrorball from 2011. The only difference that I see to the one michaelk posted is that the texture is completely based on tile-shaders, so it doesn't need an image for the holes and the size of the dots stays adjustable by modifying the circle diameter in the transparency channel . In FQRW it renders quite fast. With lit fog enabled it takes a while at least on my MacPro from 2006 ;-) I've worked with Caustics in C4D, fou