A couple more little tidbits... This is the thread they were using when they were first talking about implementing hair:  www.luxrender.net/forum/viewtopic.php  There's some things in there that they didn't end up using, so I'm not sure how useful that thread is, but it may still be worth a look.

And just for the heck of it, I modified and exported the sample Blender file from the first thread.  It's a rather large file, just for a hairball (the .lxs is 17 MB)... but maybe you dev-types will find it useful.

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currently using Poser Pro 2014, Win 10