Okay, so instead of the negative...

Its a good effort. Add a few bevels to the edges of some areas to avoid things looking too CG...

Also its worth grabbing some ref off google to see how clothing hangs on a line, I think it should be more random..

Also check the lighting, as theres not much shadow on anything, the sun is behind everything so I'd have a look at putting some shadow back and not so much ambient/global illumination

Again, a good effort but a few tweaks and it will be even better

cheers
J