Following an old discussion in 2014:
http://news.povray.org/povray.binaries.images/thread/%3Cweb.52dff97746aac96b7a3e03fe0@news.povray.org%3E/?mtop=391452&moff=21

I took up Robert McGregor's code to see how it could be tweaked to 
obtain a nice haircut. 10000 hairs were planted here. To give a rough 
approximation: parsing took about 10 minutes and complete (stochastic) 
render about half an hour with an i5 machine (Win10; Pov version 3.8). 
The small highlights on the hairs resulted from a combination 
normal/finish choices.

-- 
Thomas

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