# Lighting problem on a procedural planet

**URL:** <https://forums.unrealengine.com/t/lighting-problem-on-a-procedural-planet/1249456>\
**Category:** World Creation\
**Tags:** planet, normals, sphere, unreal-engine, please-help-me, Lighting\
**Created:** [August 3, 2023, 12:58pm UTC](https://forums.unrealengine.com/t/lighting-problem-on-a-procedural-planet/1249456 "2023-08-03T12:58:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![tibzejoker](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@tibzejoker](https://forums.unrealengine.com/u/tibzejoker)\
**Post date:** [August 3, 2023, 12:58pm UTC](https://forums.unrealengine.com/t/lighting-problem-on-a-procedural-planet/1249456/1 "2023-08-03T12:58:59Z")

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Hi everyone.

I am starting to loose my mind (and days 😕 ) on a lighting problem in UE5.  
I started a project to make procedural 3D planets with LOD, and i have a (i guess) normals calculation problem with my procedural mesh that makes the shadows generated by my planet look like the pattern of a tennis ball…

 ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/a/1/5a12af58589c61c8e66460267316075abd7d41a5.jpeg)

How do you debug lighting issues please ?

If you need the code feel free to ask me. I dont know where to start because i spent too much time on this issue.

Thanks a lot !