Table of Contents

This page introduces the Volume Grid geometry object.


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 by 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.

For a list of supported Render Elements, please check the V-Ray Render Elements Support page.

You may also check the Volumetric Rendering In-Depth guide for tips on speeding up the rendering of volumetric effects with V-Ray.

UI Path: ||Create menu|| > V-Ray > V-Ray VolumeGrid...

||V-Ray Toolbar|| > V-Ray VolumeGrid

||V-Ray menu|| > Create > Geometry > V-Ray VolumeGrid

||Create panel|| > Geometry > V-Ray category > VRayVolumeGrid > Click in a viewport to create VRayVolumeGrid

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


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

Volume Grid Options

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