Hey,
I have a new problem with material duplication in Rhino8. Previously it was always possible to duplicate an existing material and then change the texture. Now in Rhino8 the materials are always connected in some way and all textures always change together, rather than just the new one. I can’t find a way to disconnet the materials and to create a completely new texture every time is really bad for the workflow.
You can see the blue line that shows the connection of the materials in the screenshot.
Pleease help 
Is it the same issue? Solution in thread.
Hey, thanks for your answer. No, that wasn’t the problem. Apparently it was fixed with one of the last updates. I no longer have this problem 