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Volumes - Arnold for Houdini

Volumes are objects made of density, such as fire or clouds.

Note:

The rendering of volumes should not be confused with atmosphere_volume, which is a global effect.

Note:

Volumes can only receive indirect lighting from other emissive volumes when the volume_ray_depth is above 0.

Volume Formats

  • Rendering volumes with HtoA only works with OpenVDB files or VDB primtives.
  • You can also develop your own volume plugin with the new volume API.
  • It is also possible to render particles as volume.
  • You can also render polymeshes as volumes.

Volume Nodes

Render Quality

Several parameters affect the overall quality of volume rendering:

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