Interesting.....wonder if the P4 renderer would make a difference? Either can be used in P5. I just tend to use firefly since it's the default. I'll have to try both and see if there's a difference. I think saving as a .tif might help when using the firefly renderer. I tend to save anything where I don't need the mask, as a .jpg, and at the highest resolution possible. You can also adjust the resolution level in P5. The default is 72.