---
name: "vdb_lod"
section: "1"
platform: "linux"
package: "libopenvdb-tools"
version: "10.0.1-2.3+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/vdb_lod"
---

# vdb\_lod(1)

generates a volume mipmap from an OpenVDB grid

## 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).