In Poser every end user can create new material zones.
But no end user can remove material zoens from inside native Poser. => Some scripts do.

The first thing I do with each and every figure is remove material zones up to the minimum practical.

Phils V4 example is a good example.

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"!