# Refraction not affecting particle system (Niagara)

**URL:** <https://forums.unrealengine.com/t/refraction-not-affecting-particle-system-niagara/485693>\
**Category:** Rendering\
**Tags:** refraction, particle-systems, unreal-engine, question\
**Created:** [July 2, 2021, 8:51pm UTC](https://forums.unrealengine.com/t/refraction-not-affecting-particle-system-niagara/485693 "2021-07-02T20:51:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Buchinchin](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Buchinchin](https://forums.unrealengine.com/u/Buchinchin)\
**Post date:** [July 2, 2021, 8:51pm UTC](https://forums.unrealengine.com/t/refraction-not-affecting-particle-system-niagara/485693/1 "2021-07-02T20:51:47Z")

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I’ve made a refraction material for my particle system and it works in the preview window but in-game the particles are unaffected. (picture is in-game, I put a mesh behind the particle system. The mesh is affected by the refraction while the particle is not.)

![343057-refraction1.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/0/8/7/087245f0248a5dd4266cd0b3de84f7d84fd0b68a.png)

Meanwhile in the preview it looks fine.

 ![343058-refraction2.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/9/3/39308f4318564bde8c062eaa9804a9da4ca89818.png)

I’ve looked around for the same issue but answers seem to be outdated.

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**Author:** ![Holonoia](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Holonoia](https://forums.unrealengine.com/u/Holonoia)\
**Post date:** [October 20, 2021, 4:54pm UTC](https://forums.unrealengine.com/t/refraction-not-affecting-particle-system-niagara/485693/2 "2021-10-20T16:54:41Z")

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Did you ever find a solution to this? Im coming up against it. Refraction working fine in the Niagara preview but in game, not.

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**Author:** ![Holonoia](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Holonoia](https://forums.unrealengine.com/u/Holonoia)\
**Post date:** [October 20, 2021, 9:30pm UTC](https://forums.unrealengine.com/t/refraction-not-affecting-particle-system-niagara/485693/3 "2021-10-20T21:30:20Z")

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The material of the emitter/s within the Niagara system that need to be refracted by another in the stack need to have the advanced translucency setting ‘Render After DOF’ disabled.