# LineTrace backface

**URL:** <https://forums.unrealengine.com/t/linetrace-backface/427139>\
**Category:** World Creation\
**Tags:** Trace, line-trace, hit-detection, hit-result, unreal-engine, question\
**Created:** [June 11, 2018, 2:07pm UTC](https://forums.unrealengine.com/t/linetrace-backface/427139 "2018-06-11T14:07:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![damianpodwiazka](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@damianpodwiazka](https://forums.unrealengine.com/u/damianpodwiazka)\
**Post date:** [June 11, 2018, 2:07pm UTC](https://forums.unrealengine.com/t/linetrace-backface/427139/1 "2018-06-11T14:07:36Z")

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Hey,

I have a problem with LineTrace - it’s not hitting backface of walls that are made of planes.  
Is there any way to make them TwoSided for LineTrace?

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**Author:** ![Kehel18](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Kehel18](https://forums.unrealengine.com/u/Kehel18)\
**Post date:** [August 31, 2020, 6:00pm UTC](https://forums.unrealengine.com/t/linetrace-backface/427139/2 "2020-08-31T18:00:03Z")

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In fact it is not answer and I dont check it myself, but you can test this option

 ![311946-doublesided.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/2/a/a2a95857c68fedc5de3037d839cc191d3b703e81.jpeg)

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**Author:** ![twalk1776](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@twalk1776](https://forums.unrealengine.com/u/twalk1776)\
**Post date:** [May 22, 2021, 11:21pm UTC](https://forums.unrealengine.com/t/linetrace-backface/427139/3 "2021-05-22T23:21:43Z")

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Just confirming this does work for objects that use complex collision as simple. Because traces on them check against physics meshes. So making physics double sided here works.