# Niagara particle vortex spawns weird rings whenever I change the camera position

**URL:** <https://forums.unrealengine.com/t/niagara-particle-vortex-spawns-weird-rings-whenever-i-change-the-camera-position/1214832>\
**Category:** Programming & Scripting\
**Tags:** gpu-particles, unreal-engine, question\
**Created:** [June 29, 2023, 10:01pm UTC](https://forums.unrealengine.com/t/niagara-particle-vortex-spawns-weird-rings-whenever-i-change-the-camera-position/1214832 "2023-06-29T22:01:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rubm123](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/rubm123/32/476292_2.png) [@rubm123](https://forums.unrealengine.com/u/rubm123)\
**Post date:** [June 29, 2023, 10:01pm UTC](https://forums.unrealengine.com/t/niagara-particle-vortex-spawns-weird-rings-whenever-i-change-the-camera-position/1214832/1 "2023-06-29T22:01:34Z")

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![niagara-reacts-to-zoom](https://d3kjluh73b9h9o.cloudfront.net/original/4X/1/0/4/104027bc97d4a72d13fd02367ce2f708bcb322ab.png)

[https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/4/e/24e1d047178a2a1ad6d75513711d4ab0a2f50c49.mp4](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/4/e/24e1d047178a2a1ad6d75513711d4ab0a2f50c49.mp4)

So the particles have movement according to vortex force. That’s all fine. They are set to spawn at a `SpawnRate`, no bursts. They spawn on a torus shape with `Radius = 1500` and `Handle Radius = 1500`.

Now in the video, I zoom in and out of the scene and everytime I do this, a weird, tight band of particles appears. This happens in PIE and Standalone. My mouse actions shouldn’t have any impact on the spawning, I don’t know how a niagara system (apparently) can be affected by the viewport, maybe.