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Difficulty with rendering hair, using gradient map for growth
Hello,
Hopefully this is an easy setting that I’m just missing, but I’m having difficulty getting my hair to grow according to the gradient map I have mapped to its scale.
So if we take a look in the viewport (with hair lines turned on) you can see the the hair is at its longest length on the left side of the object, and slowly shrinks down in size as it moves right. Seeing this in the viewport would lead me to believe that’s how it will roughly look in the render.
However, as you can see in the render view below, the hair does in fact grow, but there’s a harsh line of growth where there should be a smooth transition from small to large.
Here is the gradient map I’m using:
I have it mapped to the scale property, but have also tried it in transparency, length, and density to no avail either.
If anyone has any suggestions, I’d appreciate it. The basis of this scene was taken from the Greyscale Gorilla “frosting over text” tutorial.
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3 Replies
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if you want the fade to go all the way to the end of the (sign?) you’d have to drop the first black node in the gradient. If it’s that you want it to fade there but not in such a straight line, with that many hairs (a little hard to tell without the actual file) maybe some turbulence to the gradient or perhaps you need a gradient in Density (and or Transparency etc etc) as well
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Thanks for the reply. The plan is to animate the growth of the frost from left to right on the sign, so the gradient is going to change over time. This is just a test gradient and I’ve tested with a handful of others that span from a simple 2 node whit to black as you suggested as well as ones with some turbulence to break it up a little. However all of these still result in the hard line exhibited in the render I posted.
I’ve also tried gradient maps in the transparency, density, and length as well and all present the same issue.
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Nevermind. Literally figured out what was missing minutes after my last reply.
Don’t know why I didn’t try it before, but the culprit was the Thickness parameter.
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