I have a scene with two mountains, one is blue, and I would like the other one the small one) to be pink.

[![enter image description here](https://i.stack.imgur.com/2nz10.png)](https://i.stack.imgur.com/2nz10.png)

In **edit** **mode**, objects have been **separated** (`P`).

When I click on the second object and add a new material with the "+" sign of the material tab, it creates a new material.

Then I `SHIFT` + `RMB` the materials, to be able to "**Copy Material to Others**"

[![enter image description here](https://i.stack.imgur.com/sLqVj.png)](https://i.stack.imgur.com/sLqVj.png)

I then go in the new instance of the material (by clicking on the small mountain), and change the color with a green (I know I said pink... forgive me)...

[![enter image description here](https://i.stack.imgur.com/nG5CR.png)](https://i.stack.imgur.com/nG5CR.png)

... *and all the colors change*! But I was just in another color, **I just wanted the small mountain to change**.

Even the other instances of materials I created with the "`+`" button have all changed to green suddenly. Every one of them. On both meshes.

[![enter image description here](https://i.stack.imgur.com/4z0lv.png)](https://i.stack.imgur.com/4z0lv.png)

So, are node-based materials like physics simulations, in that "*[there can be only one](https://blender.stackexchange.com/questions/2109/is-it-possible-to-have-more-than-one-smoke-simulation-in-the-same-scene)*"?

Obviously it's possible to recreate materials from scratch every time, but... there's gotta be a way to "unlink" these material settings, so that I can make a new object, apply this material and then change the color or texture, based on the existing tree?

Here is another example of trying to duplicate a material and all the materials *changing together when I only edit one of them*:

[![enter image description here](https://i.stack.imgur.com/hiilY.gif)](https://i.stack.imgur.com/hiilY.gif)