My only complaints are that you're falling into the standard Poser/DAZ traps.
Antialiasing (aka postfilter) your image. If you do this and export your image in .png format you'll get a nice alpha channel to knock out the backround and retain your nice, smooth lines.
Be conscious of your light sources. The sun is to her back. It should generate reflections and shadow. It's only 1 more diffused light source.
I'm having trouble determining which model you're using. (Victoria, She-Freak or something else.) If it is V3 or She-Freak you can fix the shoulder areas with a preset morph that's only on the shoulder areas.
Render with higher resolution textures. Your boots are getting fuzzy. If you lower the number on your bucket size it will allow you to crank up the quality without killing your machine.
Now, go render more superheroes.