With the lightest marker (25% Gray) apply the shine.
Do not let the marker work dry. Immediately apply the medium shade (75% Gray) leaving the shine light Gray.
Do not let the marker work dry. Immediately apply the black leaving space for the medium shade Gray and the shine light Gray.
Using the light Gray marker, go over the entire garment, pressing firmly. This will allow the marker shade to "bleed" into each other, simulating the soft look of velvet.
Using the white Prismacolor pencil draw in the seams, dart, folds and lightly shade highlights using the side of the pencil.