Heya all, the forum stickies/suggestions seem to indicate more information is better, so I hope you can bear with me as I address my motivations and concerns.
I really wanted this piece to be a setting where the viewer is looking in on a very tranquil and calm environment, and a (hopefully) beautiful albeit unusual woman. At the start it was most important to me to play with color and mood over anything else. So I settled on this portrait:
((I used this wonderful stock photo for reference, http://fav.me/d11vt12 ))

I looked at it again later with fresh eyes and realized that while I feel I accomplished the exercise that I set out to do, it was little more than a portrait study with some unusual colors. So I decided to pull the camera back a bit and reveal more of what I envisioned the setting to be. At first I tried to really embellish the setting, lots of little techy details of a futuristic fiber optic forest and a lake of sorts, but it eventually became quite distracting and lost focus. Instead I cropped it way down and settled on this:

I was hoping to elicit a mood of soft tranquility in the presence of the unknown cold metal elements that are invading it/caging it; and that these small extra details would be enough to illustrate that without overpowering it.
Some of my concerns are:
Firstly, although I very much like the softness of the image there are certain details (like her eyes) that I’ve made too crisp to comfortably fit the looseness of the rest the painting. I hesitate rendering everything to that same level for fear of losing the mood of the piece, but I’m assuming making it feel more ‘painterly’ is not as simple as “just repaint the eyes using a bigger brush.” I’d really appreciate any thoughts on what to do here/what direction to take.
In the reverse, I’m a fan of her hair being a flat color. I like that it’s matte and almost graphic and makes her face really pop, but as I said above it might not fit as well as I like to think it does.
I’m also a little worried that I haven’t deviated from the reference enough to justify calling this an original piece. I’m relatively new to using some else’s stock photos as reference in my illustrations and I am unfamiliar with where that boundary is. If I have no model available for live ref or to take my own photo, I usually Frankenstein multiple pictures together from a reference board but I’ve seen Lunatique advise against that for all but the most advanced draftsman.
Any other thoughts, techniques, or suggestions would be greatly appreciated!