if you closely look at the arms on screenshots you will see no returns on the biceps or forearms where they touch the inside of the arm.
but at the elbow there is a 1/4" or larger return on the top of the bicep near the shoulder. and the forearm has a return at the end of the elbow
on the outside.
the thighs have return edges 1/4" at the tops and bottoms.
shins have no return at the ankle with 1/4" return at the top.
torso sections:
chest has returns at the outside of the shoulder, bottom edge of chest has a very large return.
abdomen plate has large return at the top.
kidney has large return at top.
back plate has large returns on sides, and at top and bottoms. (makes it look thicker)
every single part on a trooper suit has returns to make the armor look thicker except where it meets a joint.
inside of elbows and wrists all have the return removed.