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Hi Im creating a cliff in Houdini. I have the blockout of the big shapes, but now I want to cast some smaller rocks in between cracks and edges (concave). I'm using the Measure Curvature node to get a black/white mask of the curvature. But I don't know how I can use this colour information to create a mask on where to spawn smaller rocks. I test things out by copying a simple sphere to points but this gives me the shape of the rocks filled with the sphere. I've only found this youtube video of the curvature node: But they just skim over the nodes. Im completely stuck. Anyone an idea? Thanks!