Masoud Posted June 3, 2022 Share Posted June 3, 2022 Hi guys, In a Vellum grain sim, I would like several chunks (clusters) to interact, but not stick to each other. As you can see in the image below they stick after the collision. How can I fix it? According to the documentation, there is an option in the Vellum Solver node called "Ignore Neighbors in Same Piece": https://www.sidefx.com/docs/houdini/nodes/dop/vellumsolver.html Quote Ignore Neighbors in Same Piece: Ignore any neighbors that have the same non-negative value for the piece point attribute. This option can be enabled to create separate clusters of grains that only interact with other clusters, often in conjunction with a Shape Match constraint to give rigid behavior. The VDB To Spheres SOP can be a good method for filling objects with overlapping grains. I tried to use this option, but it doesn't work. Thanks for helping. Vellum Grain_02.hip Quote Link to comment Share on other sites More sharing options...
Masoud Posted June 8, 2022 Author Share Posted June 8, 2022 Any idea? Quote Link to comment Share on other sites More sharing options...
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