Thunderstone,

Since you ask for feedback, let me make a few observations, while first acknowledging that it is a very good render. Just not excellent (yet).

I think the lighting is great, but not the shadowing.

There is no shadow from the hair. Partly the problem is that Poser does not execute ambient occlusion effects that should be caused by nearby surfaces (such as the hair) if that surface has any sort of transparency to it. So even if you're using AO, it won't help here. (Biting my tongue. Some of you know what that means. Those that don't - don't worry about this comment.)

Have a look at this photo:

http://img.wallpaperstock.net:81/megan-fox-portrait-wallpapers_11507_1024x768.jpg

See how under the hair across her forehead, there is a shadow. Notice also that this shadow is red - SSS! This is why you want to tune the skin shader to produce a distinct redness for heavily shadowed areas.

I suspect you may have disabled shadows from hair to save time. Don't! If you want realism, you need the hair shadow from the main light on the forehead.

The realism of the face is not matched by the blouse. First it floats off her back, which draws my eye away from her face and looks wrong. The blouse is overexposed and probably should have a GC shader on it. And it needs some realistic cloth-like bump. Some wrinkles and folds would help, too. Perhaps you should convert it to dynamic and let it drape.

The hair looks a bit fake - not your fault! Almost all transmapped hair falls short of realistic. If the texture is high resolution, you may want to render that with a lower shading rate. Or you could try using texture filtering on the hair images.

If I use my hands to cover your hair and blouse, I see a photo! But those two elements scream CG here!

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