Hi @Sita Rabeling, I think the drawings looks really nice! -To "see the planes" it helps me to imagine touching the forms. It might also help to imagine a box around the subject. I imagine the box by imagining touching it's sides with my hands. - I think you can give the achilles tendon more solidity; make it a little thicker, and a little boxier. -Not a calf critique: In the back of the thigh you have a few overlaps that I think might be off. The contour for the glutes should overlap the hamstrings. Cheers!