---
title: "Aggregate Volumes in Blender"
canonical: "https://rmanwiki-27.pixar.com/space/RFB27/544637554/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://71d19c0c-36e7-4d52-afca-acc8422148ba)

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

![image](media://8a6684ba-b6e5-4a93-913c-aca1af285bad)

![image](media://dbbecf92-0092-4043-8257-ba5c91349438)

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://25b7743d-2cc8-4192-bd0f-c42058039e1b)

### 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/RFB27/pages/544639892/Integrators+in+Blender)), and then select the volume aggregate name in Volume Aggregate Name drop down list.

![image](media://6ce71619-ee8e-4b2b-8471-bc0967540846)

> ⚠️ 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)