Here are a couple of concepts I have done for Death Tribble.
We have Sea Slug and Ghost Train. I will let you guess which one is which.
I am pretty happy with how both of these turned out, there is something really fun with dealing with color in a very non-comic book way, ie, no real inked lines, but still reading as a comic book concept. The original of Sea Slug didn’t have any inked lines, I actually came in AFTER the color and did those digitally with Manga Studio 5. About the only program I can even approach a decent ink job with. I have a really hard time inking with Photoshop or Painter, but Manga Studio 5 does the trick for me.