mmmh it seem like a bug to me …
i created a big master material i used multiple of material functions, and I copied it to create the color, roughness etc… each time I renamed the parameter but it seemed it kept some link to it …
if I replace a parameter with a new one it work, but now I need almost to replace every parameter with a new one …
or is there something can I do to break the link ?
thank for your help.