![]() Surface nodes with “VDB” in their title operate on VDB volumes. You can render standard Houdini volumes and OpenVDB volumes together and they will mix properly. ![]() You can write OpenVDB volumes to bgeo files and load them at render time using the Mantra delayed load procedural, just as with standard Houdini volumes/geometry. OpenVDB volumes were added to Houdini in version 12.5. ![]() This volume type is useful for modeling sparse volumes such as clouds and wispy smoke.īecause of the way this volume type is represented in memory, it does not require that you specify a box containing the volume it can extend infinitely.ĭespite this, a VDB does define a 3D grid of voxels over the whole space. An OpenVDB volume uses the OpenVDB library to represent a sparse volume very efficiently.Ī VDB volume uses essentially no memory for “empty” voxels (technically, voxels equal to the “background value”).
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