---
title: "Aggregate Volumes in Blender"
canonical: "https://rmanwiki-25.pixar.com/space/RFB25/21561900/Aggregate%20Volumes%20in%20Blender"
format: markdown
---
## Using Volume Aggregates in Blender

### Volume Aggregates Editor

To create a volume aggregate, you can use the Volume Aggregate Editor, which can be accessed from the right click menu in the viewport:

![image](media://539734c2-8930-4009-ab0c-362431df17dc)

Hit the + button, to create a new aggregate. You can then start adding volumes that are in the scene to the aggregate:

> Macro (inline-media-image)

> Macro (inline-media-image)



You can also select the volume you want from the viewport and then add it to the group, from the right click menu:

![image](media://bc69f285-099c-43ac-ac0e-99017a30e9d2)

### Integrator

To specify the global volume aggregate to the integrator, make sure an integrator node tree has been created (see [Integrators in Blender](https://renderman.atlassian.net/wiki/spaces/RFB25/pages/21561898)), and then select the volume aggregate name in Volume Aggregate Name drop down list.

![image](media://ec908d53-04bb-4285-b255-c5d386622798)

> ⚠️ If a volume aggregate name has not been specified to the integrator, any volumes that are part of a volume aggregate will not render

> Macro (include)