Yet again i am blown away by your bootylicious figures!
One thing I noticed is you seem to have a few erroneous light sources. Not quite sure where the light reflections at the front are coming from considering how dark the rest of her front is, especially as the reflections on the side facing the main light source are so dim. I think you could have afforded to make the shadows and reflections from the main light source a bit more drastic and the dimmer colours to define the curves at the front.
Anyways i hope i helped and/or made sense
*eagerly awaits more kickass girls*