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All three are very nice and show what can be accomplished with a fairly simple lighting set-up. I agree #3 in particular is a stunner.
#2 is very nice but I think it starts to show the limitations of your set-up, perhaps also equipment and space. Getting her farther from the backdrop would not only help with the backdrop wrinkles but also help control the wash from the main onto the backdrop. A grid or flag off the side of the main might also help, as well as a light on the backdrop.
Good work. Welcome and please let's see more of your work.