Training data is a combination of clear gel like prosthesis to ones with mechanical parts. Amputee tags may help as well getting the prosthetic to cover the whole leg.

Tags

"clear prosthesis" maybe "transparent" to help get full transparency.

clear prosthesis, transparent

"Amputee, Quadruple amputee" also may help with getting the prosthesis higher up the thigh.

Amputee, Quadruple amputee