Yes, yes, yes and yes. Yes, it makes sense and yes I'd love your percentages, I've tried to calculate those like forever - without any luck. And yes you can rotate brushes, or rather you can rotate the character. There's also an option to randomise the brush to some segree. It can be tiled in different sizes and it works by importing photos. There's a special setting for displacement and transmaps. I haven't tried those yet. Still playing :o)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.