Lots of painting this weekend, starting with making a royal mess out of the background:
And then fixing it. Turns out that after all this work on the background the earlier layers aren't really visible, except in one or two small spots. I'll just chalk those wasted hours up to experimentation.
A few base colors are added to the crab woman's lower anatomy and claws, and the shading is loosely worked out. Then, it's time to start playing colors against one another.