cannot change node tree to the material

[Luxart]

Hi,
In BlendLuxCore(2.0rc1), I cannot change(link) another node tree to the material in node editor (blender2.79b).

[B.Y.O.B.]

Yes, each material has exactly one node tree, just like in Cycles.
Why would you want to change it?

[Luxart]

It seems a fake user is created for each node tree, but not for material.

So If I, remove a material from an object (save & reopen file).

The material is removed and node tree is not removed as expected.

But I can't find a way to delete nodetree (or assign to another material) from node editor.

[B.Y.O.B.]

That's true.
But I think the solution is to somehow find and delete these orphaned node trees.
I added a note here: https://github.com/LuxCoreRender/BlendL ... issues/126

[Luxart]

Volume nodes have same issue.
Currently Image & volume nodes can be unlinked manually.
But material node tree can't be removed, As we can't even select them in node editor .

Thanks for looking into the problem.

[B.Y.O.B.]

You can see them if you click the "pin" button the node editor.
Then you can also manually flag it for deletion with Shift click on X.

[Luxart]

Yes, the pinned trick works, Thanks .