Not that I know of, sorry!

Although really, is there a lot left to the imagination in this one?

she turned out great ^_^

As for critique, her upper body looks a bit "flatter" than tails and legs :)

Cool! I hope the internal lines didn't give you trouble with the shading. I'm still figuring out musculature.

I agree with Yuriko about the upper body looking flat. I think it's due to the lack of shadow on what little we can see of her backside, next to the breasts. Considering the light source, I think it would be mostly in shadow there. Her face could use a few small shadows, like in between the eyes and on the right ear. (Her right, our left)

Honestly I have more problems with my lineart than your colors. Coloring tends to make flaws more obvious, and I can see a couple of places where I should have been more careful. The thong, especially. I should have made it look tighter.

Aha! Thank you for the critique. I must now fight off the urge to go in and fix it, or Yuriko will have my head.

And don't fret about your linework; it's nice having those as a guide for where the musculature is. The only one I would have removed would have been the vertical lines coming off of her left knee, but without the shading that would have also looked strange. In all, you've got beautiful linework to color with; hope I get a chance to play around with it again!