Yes, for hair density you're inputing a lower figure into the box provided and seeing how this affects the overall density.

In the case of Shena Hair you'd need to do the calculation over all the groups to arrive at the total hair density. Also it's worth considering that a physically accurate density is only going to yield good results if the structure of the hair is close to the distribution of strands on a real human scalp (I'm not sure if that's the case with Shena Hair). I used the 70's Tacky Hair for my test of a physically accurate density because the strands were distributed evenly over the entire scalp.

I wouldn't necessarily advise going for a physically accurate result straight off, and it's really a case of striking a balance between the hair density and the root/tip widths. For my tests that run under a half hour I was using 0.2 for both root and tip widths, and then scaling the density by a factor of 4 from what they were originally (if I remember correctly - I had messed with this previously so that may be way off). Trial and error.

I've only been getting these better times in PP2012 (64bit version). Not sure how P9 or the 32 bit version would cope. Dynamic hair was still very sluggish in PP2010

 

PoserPro2014(Sr4), Win7 x64, display units set to inches.

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