As far as batlike wings go, from my understanding of bat anatomy their wings are almost exactly like normal hands. the "spokes" are pretty much identical to elongated fingers, 2-3 joints and sometimes even the small nub off the top of the wings indicating a thumb-like digit. :) ,So if you look at...
How do you do your screentoning/grays? Is it the traditional method or do you use Photoshop? Would love to see a video on your method.