I think the contrast is fine on the black one (at least zoomed out), though I agree it's too low on the red one.
More importantly though, you're repeating the same problem as before - you don't seem to be thinking about the body underneath the fabric, or the structure of the garment. Folds are the result of forces on the cloth - gravity, wind, etc pulling it in some direction(s), and the body holding it in place.