See volumes for an explanation of standard volumes and OpenVDB volumes.
This node does not filter the results. If you change the resolution you may get aliasing artifacts.
The name(s) of the VDB volume primitives in the input to be re-sampled. See specifying volumes.
If the second input is connected, you can enter the name of a VDB primitive in the second input to copy the orientation and voxel size from it.
See specifying volumes.
How to generate the new VDB’s transform.
Use the values in the transform parameters below.
To Match Reference VDB
Use the transform and voxel size from a VDB in this node’s second input. The result is a copy of the first input, aligned to the second input.
Using Voxel Size Only
Keep the transform of the input VDB, only changing the voxel size. This is useful for increasing or decreasing the resolution.
This will result in an aliased grid since no filtering is done.
Using Voxel Scale Only
Same as "Using Voxel Size Only" except that the new voxel size is specified as a scale factor.
When Define transform is "Explicitly", the order of operations for the new transform.
When Define transform is "Explicitly", the order of rotations for the new transform.
When Define transform is "Explicitly", the position for the new transform.
When Define transform is "Explicitly", the rotation for the new transform.
When Define transform is "Explicitly", the scale for the new transform.
When Define transform is "Explicitly", the pivot point for the new transform.
The size of voxels in the new VDB. Larger voxels correspond to lower resolution.
This parameter is only visible when Define transform is Using voxel size only.
The amount by which to scale the voxel size in the new VDB. Larger voxels correspond to lower resolution.
This parameter is only visible when Define transform is Using voxel scale only.
When Define transform is "Explicitly", apply the transform to the voxel values of vector-valued VDBs according to its Vector Type.
Transforming (especially scaling) a SDF might invalidate signed distances, necessitating its reconstruction. This option affects only SDF volumes, and it should almost always be enabled for those cases.
Remove voxels within this distance of the VDB primitive’s "background" (empty) value. This is necessary since the resampling can create active but "empty" voxels.
In general, you should leave this option on. Expert users may want to turn this off based on very specific situations. For example, if you know that pruning empty voxels is a waste of time since a later operation will reactivate many of them.