Hi agiel, the blur was made using Vue4. I had to crank up supersampling to 12 subsamples and "best quality" to get a smooth result. scaling down the image has helped, too (was originally rendered at 1600x1200). I found it pretty hard to get noise-free results with motion blur in Vue4. @YL, thanks a lot. :) have a nice week-end, -Sascha.rb