When reducing bucket size?
Do it as follows.
32
16
8
4

Like textures maps that work best at :
8196x8196
4096x4096
2048x2048
1024x1024
512x512

Poser is not liimited in texture size as DS is.
But? Larger texture will consume more RAM.
But? Texture catching will reduce memory load. => In general preferences.

For heavy hair it is best to remove the Light emitter check.
Incoming light does not get diffused by the hair this way.
And as hair is omnidirectional, its light diffusing is mostly not contributing to anything in the scene.

Happy Posering
Tony

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"!