The VDB LOD SOP can build multiple filtered versions of a VDB grid, providing different levels of detail. This allows making a MIPMAP-like representation. The low resolution versions both can be used as thumbnails for fast processing, but also can speed up filtered lookups by providing large volume averages in constant time.
Which of the input VDBs to process.
How to build the LOD pyramid.
Build a single filtered VDB.
Build a series of VDBs of successive refinement within a provided range.
Build a standard pyramid of VDBs of decreasing resolution.
Specify which level to produce. Level 0 is the highest-resolution level.
Specify the inclusive range /nodes/sop/start, end, step
Number of levels to generate. Each level is half the resolution of the previous level.
Preserve Grid Names
Reuse the name of the input VDB grid. Only available when a single Level is generated.