# Refraction problem in unreal engine 4.26

**URL:** <https://forums.unrealengine.com/t/refraction-problem-in-unreal-engine-4-26/479391>\
**Category:** Rendering\
**Tags:** glass, refraction, unreal-engine, question\
**Created:** [February 25, 2021, 9:22am UTC](https://forums.unrealengine.com/t/refraction-problem-in-unreal-engine-4-26/479391 "2021-02-25T09:22:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dante666](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@dante666](https://forums.unrealengine.com/u/dante666)\
**Post date:** [February 25, 2021, 9:22am UTC](https://forums.unrealengine.com/t/refraction-problem-in-unreal-engine-4-26/479391/1 "2021-02-25T09:22:18Z")

</div>

Hello  
I’m new to using materials with unreal engine and I’m looking to learn. I followed the basic tutorial to make a glass material but I don’t get exactly the right result. Indeed when I change the Refraction parameter there is a kind of window that is created in the sphere as on this image.

![330832-4zemgk.gif](https://d3kjluh73b9h9o.cloudfront.net/original/4X/6/a/5/6a52aebeeb0640e0b059c0afe5aad42b8f157b94.gif)

Can you help me ? Thank you in advance