shvrdavid posted at 4:06 PM Tue, 2 January 2024 - #4479904

W axis is the along length of dynamic hair. BB did a post with an explanation of it years ago, but I can not find it with the search here.

Dynamic hair uses 4 axes. W,X,Y, and Z.... X and Y map where the hair comes out of the scalp. Which is why you could use a texture in firefly to make strands differing colors based on where they were on the scalp. I don't recall what Z does, and W is the along length of the hair. Basically if you want to change something (color, highlight, etc) along the length, you do it on W.

The first idea that comes to my mind is that Z "could be" a kind of altitude: z > 0 would allow to start the hair above the scalp, hence the expression "pulling out one's hair". 

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