# Maps need lighting rebuilt **URL:** \ **Category:** Rendering\ **Tags:** build, unreal-engine, Lighting, question\ **Created:** [October 10, 2015, 9:18am UTC](https://forums.unrealengine.com/t/maps-need-lighting-rebuilt/334849 "2015-10-10T09:18:07Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![jonsnyder1997](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@jonsnyder1997](https://forums.unrealengine.com/u/jonsnyder1997)\ **Post date:** [October 10, 2015, 9:18am UTC](https://forums.unrealengine.com/t/maps-need-lighting-rebuilt/334849/1 "2015-10-10T09:18:07Z")
When ever I try to build, I keep getting this error. I build anything, and it just fails… I build lighting, and this map error pops up, and no matter what I do, it won’t fix! I know its a stupid question, but why would it keep giving me that every single time? ---
**Author:** ![anonymous\_user\_6e7b421a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6e7b421a](https://forums.unrealengine.com/u/anonymous_user_6e7b421a)\ **Post date:** [October 13, 2015, 3:36pm UTC](https://forums.unrealengine.com/t/maps-need-lighting-rebuilt/334849/2 "2015-10-13T15:36:10Z")
Hey jonsnyder1997, You might find this link helpful. **Lighting Troubleshooting Guide** > **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)** > > After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — https://unrealcommunity.wiki/! You will be able to find content from... Let me know if you are still experiencing issues, or if you have further questions. Cheers, ---
**Author:** ![jonsnyder1997](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@jonsnyder1997](https://forums.unrealengine.com/u/jonsnyder1997)\ **Post date:** [October 13, 2015, 4:45pm UTC](https://forums.unrealengine.com/t/maps-need-lighting-rebuilt/334849/3 "2015-10-13T16:45:58Z")
He says to go to build tab, rebuild lighting, but I’ve done that and I still get the same error. I’ve gone as far as deleting everything in the world, and it still gives me that notice. Is the folder bad and should I restart the map? ---
**Author:** ![anonymous\_user\_6e7b421a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6e7b421a](https://forums.unrealengine.com/u/anonymous_user_6e7b421a)\ **Post date:** [October 13, 2015, 6:08pm UTC](https://forums.unrealengine.com/t/maps-need-lighting-rebuilt/334849/4 "2015-10-13T18:08:18Z")
Would you provide me with some screenshots of your light sources and their mobility? i.e. Directional Light Source, Skylight, Point lights etc… Also, how many objects is it reporting that are unbuilt? ---
**Author:** ![jonsnyder1997](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@jonsnyder1997](https://forums.unrealengine.com/u/jonsnyder1997)\ **Post date:** [October 14, 2015, 1:57am UTC](https://forums.unrealengine.com/t/maps-need-lighting-rebuilt/334849/5 "2015-10-14T01:57:57Z")
I restarted my PC, and it seems to work now. Is that a thing with the editor stuck ina loop, or was my computer just messing up? ---
**Author:** ![anonymous\_user\_6e7b421a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6e7b421a](https://forums.unrealengine.com/u/anonymous_user_6e7b421a)\ **Post date:** [October 14, 2015, 1:43pm UTC](https://forums.unrealengine.com/t/maps-need-lighting-rebuilt/334849/6 "2015-10-14T13:43:47Z")
It is hard to say, but if you experience it again let me know what you were doing as soon as possible so we can narrow down some repro steps.