So a couple of people wanted to see a tut or wip of these current Zerg pieces, and Here we are!
I think it's all pretty self-explanatory, I'm not using anything particularly fancy; only using a regular hard round brush pretty much all the time, at 100% opacity, with opacity + size set to pen pressure.
Enjoy! at each of these steps I made a new layer to work on, though I wouldn't normally use quite so many for the basic painting.
Photoshop CS3, linework from Sketchbook Pro. Working size was 2000px wide.