Hi!

I'm converting an asset to VDB but some geos have no thickness (non-watertight). I remember seing some node/option to deal with those geos. It would give it thickness in a smart way... Know anything about this?

-Olivier

I always start with a polyextrude and add a small width. Sometimes it is easier just to model a watertight likeness to supply as a collider.

Geo seal by momme is a valid option:
https://momme.gumroad.com/l/geoseal?layout=profile [momme.gumroad.com]
Cheers
CYTE

Another option might be Tet Embed followed by a VDB From Polygons.

EDIT: And also turn off Enlarge Input Mesh on the Tet Embed

Or use Tet Conform instead of Tet Embed.

Vdb topology SDF will reconstruct the data, but it will be larger in size.
The trick is to appply a reshape SDF and erode 1-1.5, convert VDB to poly and us negative ISO offset values.
then you can do another VDB from polygons, from a nice watertight piece of geo, this setup of steps will get you
very close to the original source mesh.

Alright, thanks for all the info! I'll do some tests.

Olivier

In production, we get open surfaces from Modeling often. The common practice is to convert the mesh to an unsigned distance field prior to converting to a signed distance field.


I have an example in the Houdini example file https://www.openvdb.org/download/ [www.openvdb.org] Look for /obj/example_levelset/extruded_sdf