Hi. Is there a way to apply colour gradient along hair strands (from root to tip)with karma hair? It is easy in arnold, but I cant find solution in karma.

Many thanks

Jirka

use a karma rayimport or mtlx dot node to import "ray:hituv". This evaluates the parametric coordinates of the hit surface, which gives the parametric T coordinate in the green channel.

XPU seems to evaluate hituv differently. I'm not sure if it's possible to get the curve parametric coordinates in XPU.

Thanks for help. I will try