I've got these eyebrows made with a Hair Particle System using Interpolated Children. I would like to fade each hair particle as it gets further from the base. Red line is the base, green is where it would be fading to transparent.
So far, I have the particles so the base is thicker than the end which is good, but I want to fade them out even more. The material is pretty simple, just a couple of BSDFs mixed together.
I've tried to mess with Texture Coordinate or Particle Info with a ColorRamp as the Fac on a MixShader between a Transparent BSDF and the Hair Material, but it has only affected the entire particle systems, not individual particles in the system.
I am planning to render this in Cycles, so it would be nice if the solution worked in it.