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I have a custom node tree called MyCustomTreeType. I know that there are scripts to add nodes to the composite and material node trees: Controling compositor by python

How can I use this with my custom tree?

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The example of the custom PyNode tree includes information about how to add nodes to the menus via NodeCategory so i'm going to assume you've got menus working.

(if not: see TextEditor > Templates > Python > Custom Nodes )

If you want to add a node via python, it's the same as with shader trees or compositor trees, except you use data.node_groups.

ng = bpy.data.node_groups['MyNodeTree']
new_node = ng.nodes.new(your_nodes_bl_idname)
new_node.location = (20, 40)
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  • $\begingroup$ I have thousands of objects for which I need to update their materials' nodes/links using Blender's Python API. I am pretty new to nodes stuff in Cycles and I haven't been able to wrap my head around how I can do that. I wonder, do you know how one can do that? If so, could you please take a look at my question here and see if you can offer a solution? $\endgroup$ – Amir Mar 8 '18 at 17:03

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