Hello Houdini community,

Does anyone know how I can VDB only the exterior mesh surfaces. For example a high-re spaceship with modeled interiors and an open cargo door.
I would like to voxelize the exterior surface only to generate a lower poly mesh without the interior geometry. I have placed a proxy cube to make the mesh water tight. While large voxel size seem to work, finer voxels still pick up the the interior props.

I have tried several solutions, techniques, an VEX post processes, but none of them seem to work the way I expect.
I an unable to share the original file since it's too large as an attachment, it has 9M triangles, sorry.

I am still new to Houdini and I may just be missing a node or parameter and I appreciate any tips or guidance. Thank you and take good care.

Zel