I painted something not sci-fi. First, let me apologize for the crappy pics, I didn't feel like setting up the light tent.
This is a test to see if I like the mossy green triad for Orcu skin. I do. If the shading seems rough it's because I used the brushed on variant of the dip technique with brown liner. The pics don't show it very well because of the flash, but it is highlighted and shows good contrast at three feet.
And some orcen-booty
A couple more pics at my blog