Somehow I can't seem to get the whitehairs in Houdini 17 to work
Had no problems at all in 16.

Here you san see the whitehair masks (witch seems to be 100% correct in the hairgen node)



In the hair shader “whitehairs” is turned on, but every time i render it makes ALL the hairs white
somehow it seems to miss the integer mask completely.
I might be missing something here (but in Houdini 16 I never had this problem before)


Anybody any idea what might be wrong here?

The same problem to me.
The reason is that it set the whitehair attribute of all prim to 1.You could set a custom whitehair attribute before the guidemask and set value to 1.Houdini will force refresh this attribute.

But I think it's a little bug.Hope SideFX will fix it.

Yeah I hope so too.
This is quiet annoying and time consuming for no reason.

Do you mean that the workaround is to generate a custom mask with the guide mask node?
and give it the attribute name “whitehair” as well?
(or simply a attribute create node? initializing that attribute, therefore forcing the cook?)

This issue is still present in Houdini 17.5 and I can confirm that if we add and attribute create before with the same name “whitehair (class Primitive and type Integer) with a default value of 0 and, then the white hair mask works!

Hopefully this will get fixed in a next release…