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3D Voronoi Structure with Groups

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I'm still newish to Houdini, so please bare with me.

I'm trying to create walls between multiple watertight objects of uncertain shapes, which are guaranteed to have space in between them, but which are still close together.
My first idea was a 3D Voronoi structure kind of solution, a bit like this:

But instead of walls between every neighboring points, I would fill the geo with points, give them groups, and then only create walls between points of different groups, like this:


Is there a nice way to get this? I tried to use the Voronoi Fracture Sop and to promote the points in a group to primitives and blast them, but this doesn't select all primitives.

I'm also very open to different solutions! Thanks!

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Look into using the Cluster options for fracturing!

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