A quick scan of the second version of Prometheus! I'm much happier with this one. When I get my original back from the publishing house who has it right now, I'll show you what the back layer looks like as well!
I'm posting a few of the experiments I've been doing in vellum, and mylar (for the last one). I'm fascinated by the effect, although I think I much prefer the vellum to the mylar. Especially on the sphinx moth (the pink one). It has a lot of potential in the area of subtlety.