# Unreal engine 5.1 normal bug

**URL:** <https://forums.unrealengine.com/t/unreal-engine-5-1-normal-bug/1211144>\
**Category:** Programming & Scripting\
**Tags:** UE-5, normal-map, unreal-engine, bug-report, Rendering, Lighting, question\
**Created:** [June 26, 2023, 2:05pm UTC](https://forums.unrealengine.com/t/unreal-engine-5-1-normal-bug/1211144 "2023-06-26T14:05:36Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![zpghost](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@zpghost](https://forums.unrealengine.com/u/zpghost)\
**Post date:** [June 26, 2023, 2:05pm UTC](https://forums.unrealengine.com/t/unreal-engine-5-1-normal-bug/1211144/1 "2023-06-26T14:05:36Z")

</div>

I need help, the normal map breaks the light, the object does not fall properly light. On all meshes material has the same parent , but only on some materials such a bug with blackness

 ![11111.PNG](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/d/c/2dc64205a796bc6338427f837e4693bebdfc8b63.jpeg)  
 ![22222.PNG](https://d3kjluh73b9h9o.cloudfront.net/original/4X/9/a/a/9aa0d4df4f655e15276a07287217c48847d3dc1f.jpeg)  
 ![45345345.PNG](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/d/a/7dac79459dae1ebf9de2a6219ae57b3c633c2a39.jpeg)

---

<div class="post-metadata">

**Author:** ![zpghost](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@zpghost](https://forums.unrealengine.com/u/zpghost)\
**Post date:** [June 26, 2023, 3:11pm UTC](https://forums.unrealengine.com/t/unreal-engine-5-1-normal-bug/1211144/2 "2023-06-26T15:11:26Z")

</div>

A more illustrative example, when removing the normals from the material on the wall, the lighting works fine

 ![5566666.PNG](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/3/e/53e2dad45544f65a1a2a9c15ec2981948b488786.jpeg)  
 ![55555.PNG](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/d/b/3db0c96361afcc7aee23ed4c17c55e1ab3073d74.jpeg)

---

<div class="post-metadata">

**Author:** ![zpghost](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@zpghost](https://forums.unrealengine.com/u/zpghost)\
**Post date:** [June 27, 2023, 7:13am UTC](https://forums.unrealengine.com/t/unreal-engine-5-1-normal-bug/1211144/3 "2023-06-27T07:13:42Z")

</div>

The engine version 5.03 does not have this bug, why does every engine update bring new incorrigible bugs