I think these folks have offered some really good advice. I would also put In that you do a lot of things really well. For instance your posing is good and includes things like the hair, wind and gravity effects. In your gallery I see you are really good with morphs. You are definately talented.  I think the difference in a so so picture and a great scene can be just a few little tweaks. I say keep making your scenes and experiment with more dramatic lighting and camera angles. Good luck and keep at it. :)

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"The true sign of intelligence is not knowledge but imagination".

Albert Einstein