This is my first long work with digital painting. I used to make a few before but not so big. She is suposed to be Linda from the books. I know it isn't so good but any kind of critics will be more then welcome.
the thing that jumps out right away is it looks like you used burn/dodge in photoshop to shade and render clouds filter for the backgrounds. these give the image sort of a plasticy cookie cutter feel so it's best to aviod them. it would be nice to see some hard brushed for contrast too, the vast majority looks like it was made using soft ones. keep practicing though it looks like you have skill your technique needs refinement though,
I notice that the legs and lower arm of her are very crisp and clean. It's smooth. Everything else looks a little blury. Try tidying up the edges with the rest of the picture with the sharper contrast you have there. Overall I quite like the composition and linda herself looks amazing.