NAME

       vdb_lod - generates a volume mipmap from an OpenVDB grid

SYNOPSIS

       vdb_lod in.vdb out.vdb -range FROM[-TO[:STEP]] [options]

DESCRIPTION

       Which: generates a volume mipmap from an OpenVDB grid Where:

       FROM   is the highest-resolution mip level to be generated

       TO     is the lowest-resolution mip level to be generated (default: FROM)

       STEP   is the mip level step size (default: 1)

OPTIONS

       -name S[,S,S,...]
              name(s) of the grid(s) to be processed (default: process all grids of supported types)

       -keep  pass through grids that were not processed (default: discard grids that were not processed)

       -nokeep
              cancel an earlier -keep option

       -p, -preserve
              if only one mip level is generated, give it the same name as the original grid (default: name each
              level  "NAME_level_N",  where  NAME  is  the  original  grid name and N is the level number, e.g.,
              "density_level_0")

       -nopreserve
              cancel an earlier -p or -preserve option

       -version
              print version information

       Mip level 0 is the input grid.  Each successive integer level is half  the  resolution  of  the  previous
       level.  Fractional levels are supported.

EXAMPLES

              Generate  levels  0,  1,  and  2  (full  resolution,  half  resolution,  and  quarter  resolution,
              respectively) for all grids of supported types and ignore all other grids:

              vdb_lod in.vdb out.vdb -range 0-2

              Generate levels 0, 0.5, and 1 for all grids of supported types and pass through all other grids:

              vdb_lod in.vdb out.vdb -range 0-1:0.5 -keep

              Generate level 3 for the first of multiple grids named "density":

              vdb_lod in.vdb out.vdb -range 3 -name 'density[0]'

              Generate level 1.5 for the second of multiple unnamed grids and for the grid named "velocity"  and
              give the resulting grids the same names as the original grids:

              vdb_lod in.vdb out.vdb -range 1.5 -name '[1],velocity' -p

AUTHOR

       This manual page was written by Mathieu Malaterre <malat@debian.org> for the Debian GNU/Linux system (but
       may be used by others).

vdb_lod 10.0.1                                    January 2025                                        VDB_LOD(1)