I am working on my first Terragen scene, a planetscape (but with an earth-like sky), but I'm having problems with horizontal lines in my clouds. This is a 3d cumulus layer. I see the lines in the TG2 render window as well as in the .bmp and .exr files (looking at those in PS CS2). First of all, is this something strange with my monitor or do others see the lines too? I've attached the scene, along with a closeup of a section of clouds with streaks. I keep changing the number of samples and the jitter, just small increments at first but I'm all the way up to 64 samples and the jitter is set on 3. I could not tell any difference between jitter 1 and jitter >1 My other settings are: quality 2.29424, edge sharpness 5.5528, cloud density 0.006, cloud density -0.475, cloud colour 1, scattering colour .5 I'm not sure where the quality setting came from, I think when I changed the sample number, the quality value changed also. Any suggestions are appreciated!