These are mostly based on the work of Naavs, whose Ahsoka Tano work also inspired me to do a few like images.
I will attach the image that inspired each one below, but here are links to his stuff if you want to check out his site for yourself:
"Dat Ass" Capt. Phasma
I haven't done one like the third one yet, but I may update this post in awhile.
The artist that inspired the next image goes by the name of "Da Polar Inc", but I found it at a site called "Rule 34", as I don't have a account where he posts his stuff.
Some more boring notes (but its my blog, I'm allowed to be boring ^_^):
The "First Order Trooper" outfit comes from Vanishing Point, which has provided a lot of Star Wars props for free: Vanishing Point Freebies
I tried my best to match the face of my model to that of the actual actress, Gwendoline Christie. I think I did okay, but you can only tell with a close up (I may do a comparison pic and post it here as well).
Something else I discovered while searching for images of the actress: She has actually posed nude in the past! 0_0
I'll leave it to you to do the image searching. I do find it unusual that someone with her body type chose to do any kind of nude modeling, but from what I could tell it had to do with something about 'bodies of all types being beautiful' and all.
However, for my images I decided to go the way Naavs did, and give her a somewhat muscular build.
I found this character interesting, but she may end up like Darth Maul or Boba Fett: a promising character that will end up poorly underused. I've read that she will be in Episode 8 though, with promises that she will have a larger role.