Lots of time people want to know how to do odd things with nodes, and we need a thread that is nothing but useful node tricks to do things that you might not first think of. I was trying to remember how to access the length of dynamic hair to make changes over the length, which I think is on the W axis in FireFly. I came up with a very simple solution on how to do it in Superfly. Here is the shader just to modulate the color along the length in SuperFly.

You only need the mapping and texture nodes if you want to modify the positions of the colors. Which takes some experimenting.

Obviously this could be used to drive various texturing setups, but it wont wont for all of them I have tried for some reason. Driving the Principled Hair shader with it doesn't seem to work so well.

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