---
title: "P Pass"
url: "https://help.maxon.net/c4d/en-us/Content/html/IN_SELFDYNAMIC.html"
section_path: "Thinking Particles > Nodes > TP Initiator Group > P Pass"
element_id: "IN_SELFDYNAMIC"
description: "To add a gravitational force to particles, group the particles and use PPass to pass the group to a PGravity Node."
---

# P Pass

![Image: 002693.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/002693.jpg)

To add a gravitational force to particles, group the particles and use PPass to pass the group to a PGravity Node.

This frequently-used Node allows you to pass a group of particles to another Node. PPass is used to control which particle groups have which effects applied to them.

For example, suppose you want to apply gravity to a particular group of particles. In this case you would first assign the group to a PPass Node and then connect the PPass Node's Particle output to the Particle input of a PGravity Node.

![Image: 002694.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/002694.jpg)