It's not uncommon effect when character limbs are put at extreme angle (90 degrees from the basic t-pose is pretty extreme) and the animation rig isn't built with it in mind. It's not so much the thigh that's at fault here, but the hip/butt area failing to maintain proper volume due to stretch of the joint.People talking about the face but what is this? is it like Popeye?
View attachment 2030432
Personally, i was more bothered by apparent buns of steel, with zero deformation. She's going to crush the MC's head with these, like Tybalt's watermelon.