I can't tell how much has been done as I haven't seen the original cut.
I can however tell you that:
The edge blending between the layers is a bit shoddy and needs to be smoothed, and/or pentooled better.
The depth is sorta fucked, and it's difficult to tell where the render begins and the background ends.
Too many lights and flares as well, which divert attention from the main subject (the girl).