Cameron, Yes, that may be the issue. Running an external monitor from a Macbook Pro. 8mb RAM May be runnning on 256 vram instead of 512. Will research that. But, I rebooted 2 more times and it now appears back to normal colors on other aircraft. So I dont know what happened, but will be more watchful when I try the DC-3 again. I am a little suspicious that I was in some view other than Window view when I switched planes. Guess too, good idea to disable Gizmo and shrink wrap when I fly other planes. Thanks very much for your help and patience. John