Finally felt ready to add the rim-light. This is where all that anatomy rendering pays off, as I don't need to think too hard about where the light goes. I'll probably render 80-90% of the piece in B/W, before coloring it.
I adjusted the look of the fins, but i'm not 100% satisfied just yet. That said, I decided to let the lightning peek through a little bit, for some extra spice.
Quite a jump from the last update. I accidentally saved over an older version, that contained the things that happened between this one and the last - But I'll blame photoshop, since I don't feel like I was fully at fault. That does mean, that I can't show what happened earlier.
Don't worry. It wasn't pretty. This is much better.