if for instances i have some trees instanced and i want some variation on the albedo just for the leafs?

That might be helpful for you.

https://youtu.be/Aql6SIOIyXs?t=692 [youtu.be]

i followed that video time ago but i dont understood where he find that "leaf tint" attribute, that video don't explain very well the all steps, i see also that in solaris thereis a node called material variation.... why they don't put more effort to explain what it's the best workflow to tackle this....

In the Material variation node, put something like this:


https://www.sidefx.com/forum/topic/76074/ [www.sidefx.com]

Piledriver
i followed that video time ago but i dont understood where he find that "leaf tint" attribute, that video don't explain very well the all steps, i see also that in solaris thereis a node called material variation.... why they don't put more effort to explain what it's the best workflow to tackle this....

What about this

https://youtu.be/SUvFaCAbyZ4 [youtu.be]

Be aware that there is still limitation on instancing and materials:

Listen to this...

https://youtu.be/n0-oSubrggA?t=578 [youtu.be]

i'm looking to a method that can have control not only to randomize colors but also controlling the saturation like arnold does with ai jitter node, anyway thanks for the links i'll follow them,i've seen also with color correct node and try to change the saturation control but seems not working xD

Piledriver
i'm looking to a method that can have control not only to randomize colors but also controlling the saturation like arnold does with ai jitter node, anyway thanks for the links i'll follow them,i've seen also with color correct node and try to change the saturation control but seems not working xD

You can create attribute randomize inside sop level after your object and inside your material network use bind to connect it to hue.