Hi! Thanks again for the great help. Now I manage to circle the light along with the camera, and the script produces png files instead of bmp files. But I still have a problem when I try to change the output resolution of the images. The images are always 374 x 386 pixels no matter what I have in the Render Options dialogue and it doesn't matter what I write in the function 'scene.SetOutputRes(200,200)'. I would prefer lower resolution output images then 374 x 386 pixels. Any help would be appreciated! /Dan