This critique is being left on behalf of Graphite-Gods, as requested.
I very much enjoyed viewing the time-lapse video of your creating this and I'm impressed in your methodical approach in working up each area in stages.
This is a most accomplished work and I love the dramatic lighting, there is little (if anything) that I could criticise about this. I like how you have placed her in the composition and the drama of the bright oval, which sets of her shadowy body well; I can't help but think of the oval as a light source, or to wonder why her shadow is not cast upon it (considering how her back is lit) - but this is me being picky.
I think you achieve a lot in this, the subtle detail in the shadow is most impressive.