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is there a way to organize nodes fast? or group a bunch of nodes to easily move them around?
Align nodes: Updates the layout and align nodes based on their connections.
https://docs.arnoldrenderer.com/display/A5AFCUG/Arnold+Shader+Network#ArnoldShaderNetwork-Shortcuts
Grouping is not possible unfortunately, we have only the align node feature which Lee posted. Porting shaders to the new native C4D node editor is on the roadmap, which makes grouping possible. But I don't have any ETA at the moment.