Looking for a solution for distanced-based hair density/length control, would really appreciate any pointers or alternative approaches.
- I'm building an earth-like planet (SubD > Sphere > Displacement);
- Terrain is colored with Proximal gradient from center point (control null for ref), closest points are brown for soil, mid are green for foliage, furthest are white for snow.
Now I am trying to grow vegetation in the mid region, cleanest solution seems to be hair, but none of my approaches worked for mapping the region I want it on.
What I have tried so far:
- Used the same proximal from the terrain colors to drive hair length/density, does not produce functional results (could be a scale issue but it would seem logical that the scale is preserved from the terrain colors in this context too)
- Tried a spherical gradient to map out distance in space, didn't get the result I was looking for.
I don't want to manually paint guides, looking for a procedural solution cos it is doing my head in when I am 110% sure it's doable.
I'm attaching the scene file, I deleted the hair and the ref geo for size reduction, but basically I would just make the SubD editable and use that geo for hair ref.
Thank you in advance for any info on the subject!
EDIT: in the hair material included there is a shader map in the Length slot, ideally that would be the surface area I'd want to grow the hair.