This page introduces the Volume Grid geometry object.


Page Contents ×


VRayVolumeGrid is a special kind of volumetric effect that works with grid-based cache formats, compared to Environment Fog which is a general purpose volumetric effect. The Volumetric Grid reads its data from an input file which supports grid-based representation of the volume.

Currently VRayVolumeGrid supports three volume formats: 

  • OpenVDB (.vdb ) - Supported by Houdini ® , FumeFX ®  and RealFlow ®  
  • Field3D (. f3d ) - Supported FumeFX ® and Maya ® (using 3rd party plugins)
  • PhoenixFD (. aur ) - Phoenix FD ® native volume format


Immediately after the VRayVolumeGrid is created, a dialog appears for selecting the input file. After selection of the input file, a number of options are available to fine-tune and customize the volume.

The VRayVolumeGrid can also be created by dragging and dropping a relevant input file inside the active viewport.



UI Paths



||Create menu|| > V-Ray > V-Ray VolumeGrid > Click in a viewport to create VRayVolumeGrid

||Create panel|| > Geometry > VRay category > VRayVolumeGrid > Click in a viewport to create VRayVolumeGrid


Volume Grid Options

The following options are provided for modifying the appearance and rendering of the volume grid.

 Rendering VolumeGrid with any Render Element via the V-Ray GPU engine is not supported yet.