# Can't build lighting, builds all but 1

**URL:** <https://forums.unrealengine.com/t/cant-build-lighting-builds-all-but-1/375523>\
**Category:** Rendering\
**Tags:** unreal-engine\
**Created:** [November 6, 2016, 2:55am UTC](https://forums.unrealengine.com/t/cant-build-lighting-builds-all-but-1/375523 "2016-11-06T02:55:49Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![anonymous\_user\_480aa98c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_480aa98c](https://forums.unrealengine.com/u/anonymous_user_480aa98c)\
**Post date:** [November 6, 2016, 2:55am UTC](https://forums.unrealengine.com/t/cant-build-lighting-builds-all-but-1/375523/1 "2016-11-06T02:55:49Z")

</div>

I can’t build lighting for 1 thing,

I used a method to see what’s not being built, and the output log gave me this:Begin Map

"  
Cmd: DumpUnbuiltLightInteractions  
DumpUnbuiltLightIteractions  
Lights with unbuilt interactions: 1  
Light LightSource\_1  
Primitives with unbuilt interactions: 1  
Primitive FoliageInstancedStaticMeshComponent /Game/Levels/Level1.Level1:PersistentLevel.InstancedFoliageActor\_0.FoliageInstancedStaticMeshComponent\_1  
"

Why isn’t the lighting being built for these?

---

<div class="post-metadata">

**Author:** ![Tim\_Hobson](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Tim\_Hobson](https://forums.unrealengine.com/u/Tim_Hobson)\
**Post date:** [November 6, 2016, 5:26am UTC](https://forums.unrealengine.com/t/cant-build-lighting-builds-all-but-1/375523/2 "2016-11-06T05:26:06Z")

</div>

Hi PlanetRenox,

When building lighting with foliage you have to make sure to use a lower lightmap resolution otherwise the lightmap for the instances will be too large and will not build due to the number of instances painted.

Try using a lower lightmap resolution or disabling static lighting for your foliage.

> **[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...

-Tim

---

<div class="post-metadata">

**Author:** ![anonymous\_user\_480aa98c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_480aa98c](https://forums.unrealengine.com/u/anonymous_user_480aa98c)\
**Post date:** [November 9, 2016, 11:40am UTC](https://forums.unrealengine.com/t/cant-build-lighting-builds-all-but-1/375523/3 "2016-11-09T11:40:48Z")

</div>

I REMOVED all foliage and it still wont go away!

---

<div class="post-metadata">

**Author:** ![anonymous\_user\_480aa98c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_480aa98c](https://forums.unrealengine.com/u/anonymous_user_480aa98c)\
**Post date:** [November 9, 2016, 11:47am UTC](https://forums.unrealengine.com/t/cant-build-lighting-builds-all-but-1/375523/4 "2016-11-09T11:47:12Z")

</div>

I had to empty the foliage load in the editor, basically remove it all if im not using it…

SOLVED

FIXED