---
title: "Particles"
canonical: "https://rmanwiki-27.pixar.com/space/RFH27/544644151/Particles"
format: markdown
---
![image](media://c725e36e-f661-4dd6-8a70-2d6dec3a8ff9)

RenderMan will render Houdini particles as spheres.

Point scale is controlled with the *pscale* primvar. Add a geometry attribute named "pscale". Use [PxrPrimvar](https://renderman.atlassian.net/wiki/spaces/REN26/pages/19661665) to read the value in networks. Otherwise we support he standard [Houdini attributes](https://www.sidefx.com/docs/houdini/dopparticles/attributes.html) and can be handled through PxrPrimvar or [PxrAttribute](https://renderman.atlassian.net/wiki/spaces/REN26/pages/19661579) for shading networks.

To create uniform scale, you can also used the Width parameter under the** RenderMan > Geometry Specific > Points** tab on the object level. This attribute is ignored when there is a pscale attribute on the geometry. 

- Width: Specify the uniform width measured in pixels
- Falloff Power:  Allows the user to soften the edge of particles

Other RenderMan geometry values will appear in the Geometry Tab but are ignored.