True but what's the point of using stand based hair, which Poser has had since version 5, if the render engine cannot reder it properly.  The problems with it were also noted in the same section.

These are just things I found noteworthy in the paper. 

As far as renderers go, I have access to scan line, raytraced and unbiased renderers.  Which I choose depends upon what I want. 

If you want more realism, have you tried an unbiased renderer?  It might give you more of what you're looking for.