# Static vs Dynamic lights problem

**URL:** <https://forums.unrealengine.com/t/static-vs-dynamic-lights-problem/351185>\
**Category:** Rendering\
**Tags:** static-light, dynamic-lighting, unreal-engine, Global-Illumination, Rendering, UE4, question\
**Created:** [March 20, 2016, 9:27pm UTC](https://forums.unrealengine.com/t/static-vs-dynamic-lights-problem/351185 "2016-03-20T21:27:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Mugurel\_Enache](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Mugurel\_Enache](https://forums.unrealengine.com/u/Mugurel_Enache)\
**Post date:** [March 20, 2016, 9:27pm UTC](https://forums.unrealengine.com/t/static-vs-dynamic-lights-problem/351185/1 "2016-03-20T21:27:25Z")

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Hello,

I’m facing a big problem within Unreal Engine which includes light rendering. Well, if I set my lights to static, everything in the scene has got no shadows; but - if I change them to dynamic, BOOM, everything has a shadow BUT the GI is worse → the ceiling gets black.

Any suggestion?

Thanks! 😃

**STATIC:**

 ![83124-highresscreenshot00082.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/c/d/1/cd1016d0f1344f4521bf7ce04f6ffac4b9f9c7e5.jpeg)

**DYNAMIC:**

 ![83125-highresscreenshot00083.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/7/a/87ae4b62bb0896e84155faa1bbd28a9ca6523e13.jpeg)

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<div class="post-metadata">

**Author:** ![Jacky](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jacky/32/918690_2.png) [@Jacky](https://forums.unrealengine.com/u/Jacky)\
**Post date:** [March 21, 2016, 2:28am UTC](https://forums.unrealengine.com/t/static-vs-dynamic-lights-problem/351185/2 "2016-03-21T02:28:46Z")

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How many light sources do you have in that space and where are they located? Have you changed and lightmass settings in World Settings? An in-editor screenshot would help. My guess is you either need to decrease attenuation radius or intensity of the light sources to limit/decrease the light bounce.

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**Author:** ![Geogos999](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Geogos999](https://forums.unrealengine.com/u/Geogos999)\
**Post date:** [July 17, 2016, 9:36pm UTC](https://forums.unrealengine.com/t/static-vs-dynamic-lights-problem/351185/3 "2016-07-17T21:36:53Z")

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Hey,

You can try adjusting the settings for the light propagation volume for better GI. That may help the shadowing issues you’re having.