Once you've studied Dr. Geeps heap of great advice... If you're starting...use limits with IK on feet. this will keep the chins in line (no sisde to side on chins or forearms in real life). Use twist and bend on thigh and shoulder 1st 90% IK on, off) Fine tune with buttock and collar (small amounts). Best to buy 1 good poseset (schlabber!) and dpart from there...IK off, use limits off... As for the Grand canyon (v3's butt), this will require some diligence...Depending on view, you can raise up to 2.00 and glut small quite a ways. Subtle twist and side to side on buttocks. Sinking the offending maximus into a cushion helps. This is one of her weak parts so you have to be clever.