Procedural Sponge Modifier (Blender Geometry-Nodes)

A Blender file with Geometry-Nodes modifier to procedurally turn any mesh into a sponge.

Requires Blender >=5.0.

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When rendering as volume, we suggest to use Cycle, as it gives much better results compared to Eevee.

This modifier changes the geometry of the object on which is applied by converting to volume-grid and performing subtraction in volume space. You can decide whether the returned results are in volume or mesh form.