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point color on a changing mesh

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I have an animation from a fractured finite elements sim. the resulting geometry has been smoothed with vdb and re-meshed ect. the geometry and point count is different on every frame. I'm trying to figure out a way to color parts of the geometry hopefully with the paint sop. obviously UV's are not an option. Painted or grouped points on one frame will be distributed to to different locations on the animation on another frame. A rest sop doesn't help as the geometry in constantly changing. Is there a way I can paint color on part of the animation and have it stick there. Thanks

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You could paint colors in the geometry that you get from dops before the vdb process, and then attribute transfer the colors from that mesh into your vdb mesh.

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