Perhaps it is due to view angle.

But?? Is the left shin "thicker" then the right shin?
It shows in all 3 of your latest previews?

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!