I think what you have right now is pretty solid. The pants look fine to me, you just need to think of it in 3D from and space and make parts that is facing away from the light darker. For the folds, what you have looks decent since it looks like the pants is made of a thicker material which just creates less folds. I would just recommend adding darker shadows, adding more highlights and be try to add more cast shadows with harder edges. I tried make it less contrast because it seems like that's what you are going for but if you want something more readable, just increase the contrast of light and shadow. | Artwod Feedback