Is it possible to reduced the amount of segment in the back of a UB spere
Ex: Supposed you want to model a head starting with a UV spere
The front of the head needs a lot of segments because the amount of details on the front face is large while in the back of the skull there are very few features
You don’t want to start with a uv sphere for head modelling – the face /edge loops have to follow the muscles (parallel and perpendicular) for good results. I would suggest torq’s face tutorial which sets up the face/edge loops in a reasonable manner.