The 'trick of the light' Dr. wily describes comes from a bit of an error on my part that I noticed in post - basically, Dr. Wily wasn't the right size when he was working on Gamma - he should have had a 2px definition instead of 4px, but, it worked fine - right up until I started playing around with my sprites of Dr. Wily in the cockpit. Besides, it all worked out better in the end, since now, Gamma was just far away, and while approaching, I could resize him to match the foreground (4px definition). With a giant robot, bigger is better, eh?