multiple light problem

i have a bust of batman, and it has two raytraced spotlights, and one raytraced lamp…when you put these together, the final render gets these weird jagged edges (from the lights colliding?). this happens any time multiple lamps are used with raytracing…any help would be much obliged.


maybe this will help:

Cubic Difuse Shading

that solved it! apperently a cubic algorithm was applied to the diffuse lighting…in short, i have no idea how the hell these geniuses do this stuff, but im glad they do!