Never sculpt a pronated (palm down) forearm with parallel bones. The muscle bulge on the thumb side (brachioradialis) will pop up, and the ulna will become a sharp line along the pinky edge.
When depicting the arm and hand in motion, sculptors should be aware of the following key anatomical landmarks: arm and hand in motion by anatomy for sculptors pdf verified
The search for is not about hoarding files; it is about solving a specific visual problem: How do I make the flesh feel alive? Never sculpt a pronated (palm down) forearm with