---
title: "Aggregate Volumes in Blender"
canonical: "https://rmanwiki-26.pixar.com/space/RFB26/20086788/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://2247a922-e9b8-4cc4-9544-cda0f0197db3)

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

![image](media://f9554aab-e07a-4951-95a0-e39cb79dd97a)

![image](media://8cafea74-caf7-4455-93b5-c409b8ebc883)

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://2fe1b77f-7c33-413b-aa7c-20cda742fca3)

### 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/RFB26/pages/20086848)), and then select the volume aggregate name in Volume Aggregate Name drop down list.

![image](media://af4caeaa-996a-4d40-bd91-fd491b87becb)

> ⚠️ 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)