I’ve seen colour comics that use devices like sepia-tone or washed-out pastel hues to indicate a flashback sequence (um, why no, I can’t think of any specific examples right offhand, but when I do I’ll come back and edit this post 😛 )… so that gave me the idea that rendering a sequence all in grays [no black, no white] might give me the grayscale equivalent of such an effect.
I think it works fine, and I’m inordinately pleased with myself that I was able to figure out how to make that happen. Yes, it’s probably a very simple and obvious trick, and I’ve probably re-invented the wheel here. But this computer tweaking of art is still pretty new to me so I feel like I’ve got at least one backpat coming to me for this one. 🙂 And yeah, next time I use a flashback sequence in Space Kid! I expect I will do this again and make it like the standard representation for this series.