>>7641625
Oh okay, my bad then. My brain got tricked on the angle because you drew that muscle in the arm with the yellow line instead of also using the green line to show the muscle in addition to the missing armpit with the cyan line and the magenta line bicep being too constricted near the front.

low/beg/ opinion again but I think it's usually fine to omit those muscles but in this particular case, the stretch is prominient enough to have to flesh out those lines I guess. But again, you have more experience so it's your call.