Hello,
I had a grass shader but lost the full scene and only have the shader left.
When I try to use the shader now, the karma hair shader behaves weirdly.


When subd is not enabled, it only puts the color on the points.
If subd is enabled, it only puts the color on half the ribbon ?

I am very confused by this and don't understand why this is happening, I thought I did the exact same thing.

Below you can find a simplified scene.
Any help is greatly appreciated.

Hi Nic.

The hair math works properly only with rounded curves, not with flat/oriented.

You definitely should try another shader for grass. That would be more correct from math point of view as well as from shading point.
Hair shading looks more like a rough glass on macro level, for grass you need something like reflective/transmissive diffuse + specular.

Thank you.
Best Regards,
Igor