Drat! I KNEW there was something I'd forgotten about raytracing: shadows, of course. However, Promajo, it might be worthwhile trying a render with ray-tracing off, just to see if that cures the problem (since both you and ernyoka1 get it with raytracing on...) If it does, then wiser/more experienced minds than mine will probably have to help you if you really need raytracing. (For the vast majority of the stuff that I do I'm content with mapped shadows, and I've not noticed the problem you both have.) Cheers, Diolma