---
title: "21 - Particle > Glow Group"
url: "https://help.maxon.net/rg/en-us/Content/html/21-Form-particle-glow.html"
section_path: "Particles and 3D > Form > 21 - Particle > Glow Group"
description: "The Glow group controls a glow around certain particle types. This is active when Glow Sphere or Star are chosen as the Particle Type."
---

# 21 - Particle > Glow Group

Form

### Particle Group > Glow Group

The Glow group controls a glow around certain particle types. This is active when Glow Sphere or Star are chosen as the Particle Type.

|  |  |
| --- | --- |
| ![pggg](https://help.maxon.net/rg/en-us/Content/Resources/Images/pggg_trapcode-form.png) | ![pggg2](https://help.maxon.net/rg/en-us/Content/Resources/Images/pggg2_trapcode-form.png) |

*The Glow group (left) and Glow Sphere and Star options in Particle Type (right).*

**Size %**

Sets the size of the glow. Lower values give a faint glow. Higher values give particles a stronger glow.

![glow-size100](https://help.maxon.net/rg/en-us/Content/Resources/Images/glow-size100_trapcode-form.jpg)\
![glow-size300](https://help.maxon.net/rg/en-us/Content/Resources/Images/glow-size300_trapcode-form.jpg)\
*Size at 100 (left) and 300 (right). This example uses the "tf2_Virus" preset.*

**Opacity %**

Sets the opacity of the glow. Lower values give a transparent glow. Higher values give particles a more solid glow.

![glow-opacity10sm](https://help.maxon.net/rg/en-us/Content/Resources/Images/glow-opacity10sm_trapcode-form.jpg)\
![glow-opacity100sm](https://help.maxon.net/rg/en-us/Content/Resources/Images/glow-opacity100sm_trapcode-form.jpg)\
*Opacity at 10 (left) and 100 (right).*

**Feather %**

Sets the softness of the glow. Lower values give a globular, distinct edge. Higher values give particles a feathery, soft edge.

![pggg6](https://help.maxon.net/rg/en-us/Content/Resources/Images/pggg6_trapcode-form.png)\
![pggg7](https://help.maxon.net/rg/en-us/Content/Resources/Images/pggg7_trapcode-form.png)\
*Feather at 0 (left) and 100 (right).*

**Blend Mode pop-up**

The Blend Mode controls how particles are composited together.

![pggg5](https://help.maxon.net/rg/en-us/Content/Resources/Images/pggg5_trapcode-form.png)

- **Normal:** Normal composite operation.
- **Add:** Particles add together. This is useful for light effects and fires.
- **Screen:** Particles screen together. This is useful for light effects and fires.