Thanks, BB! I've actually tried a couple of different waysways. I have what should be the white areas in each traditional trans map in separate layers on a black background in a PSD. I've tried applying color overlays to those layers. I've tried creating a black background and three pure hue layers and then applying the original trans maps as layer masks. Nothing seems to work.

As we speak, I'm using color math nodes in Poser to turn my three traditional trans maps into an RGB-channel-based combo and rendering it on a square prop. Let's see if that works. If not, do you have any alternative software that you'd recommend for this sort of data manipulation?

EDIT: Nope, that didn't work either.