Hi :) Im all new here but would like to help... I am by no means an expert or anything, but have gotten compliments on my fabrics so here goes (and I've included a really bad example too rofl) Even though the fabric is a transparent one you are still going to have shadows and highlights. What you can do to get them to look right is dont work with the image as transparent at first. Paint it as if it were a solid piece of material then drop the layer opacity once you are finished with the layer. Ok so how do you "paint" fabric in Photoshop..... eesh LOL I dont know that they would let me have that much room here but lets see if I can help some.. Do what the others said.... take a solid color piece of fabric and toss it in a chair or something and study it. What you want to look at are the highlights and shadows and the way fabric lays. When I paint fabric in photoshop I mainly use Dodge, burn and smudge tools. Use a soft edge brush and put in your shadows with the burn tool, the shadows will be where ever there are creases, folds or tucks in the fabric. Then I use the smudge tool and basically just smear in the ridges or high areas around the burned in shadows. Smudge over the shadows and think of the fabric as a fluid (sorta) make it look fluid by smudgeing in long smooth strokes with a soft edge brush that is a little bigger than the brush you used to burn with. Once you do this you will see what I mean, it will start to look like a piece of silk draped across the figure (hopefully) go back after all the smudgeing and add in highlights on the fabric ridges with your burn tool. One thing to remember is that whenever fabric changes direction naturally there are lumps curving out as well as dips on the opposite edge. Think of a flag blowing in the wind (see very bad example in graphic lol) look at the ripples along the top edge as compared to the bottom edge Anyway, I hope this helps some... take a look at this quick thing I made as an example, look at the shadows and highlights. All I did was paint a soft edge white object on a layer of it's own over a black background, then burned in some shadows, smeared them around with the smudge tool until they looked kind of like fabric then added in some highlights. Oh and you need to darken your shadows some more on your image, but I think you're getting pretty close. Just play with it some more ;) the more you do it the better it will be!