# how to switch lightmap to another?

**URL:** <https://forums.unrealengine.com/t/how-to-switch-lightmap-to-another/343809>\
**Category:** Rendering\
**Tags:** unreal-engine, Lightmap, Lighting, Rendering, UE4, Blueprint, question\
**Created:** [January 12, 2016, 9:18am UTC](https://forums.unrealengine.com/t/how-to-switch-lightmap-to-another/343809 "2016-01-12T09:18:13Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![desaicx](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@desaicx](https://forums.unrealengine.com/u/desaicx)\
**Post date:** [January 12, 2016, 9:18am UTC](https://forums.unrealengine.com/t/how-to-switch-lightmap-to-another/343809/1 "2016-01-12T09:18:13Z")

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Hello ~

I’m trying to create the BP to switch lightmap.

I created two different lighting condition, and am wandering if there is any possible way to switch between lightmaps.

Thank you.

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**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:** [January 12, 2016, 2:38pm UTC](https://forums.unrealengine.com/t/how-to-switch-lightmap-to-another/343809/2 "2016-01-12T14:38:37Z")

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HI Desaicx,

There isn’t a way to switch out the lightmap for a specific object or scene in this kind of way. When the lightmaps are built for the scene these individual objects lightmaps are packed into a texture atlas with other lightmaps. The best solution as a possible way to test and experiment with would be to have the object setup as it’s own level within the persistent map (Menu \> Window \> Levels) that can be switched out when needed. It can get tricky to setup and confusing if you have a bunch of objects, possible depending on some circumstances.

Thank you!

Tim

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**Author:** ![desaicx](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@desaicx](https://forums.unrealengine.com/u/desaicx)\
**Post date:** [January 14, 2016, 9:16am UTC](https://forums.unrealengine.com/t/how-to-switch-lightmap-to-another/343809/3 "2016-01-14T09:16:56Z")

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I’m wandering if there is a good tutorial and documentation to learn level streaming.

Thank you Tim 🙂

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**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:** [January 14, 2016, 5:04pm UTC](https://forums.unrealengine.com/t/how-to-switch-lightmap-to-another/343809/4 "2016-01-14T17:04:47Z")

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There is an example level in the Content Examples project available on the Learn tab in the Epic Games Launcher. This level can be dissected to see how it works.

One user posted an in-depth breakdown and setup for using level streaming manually that should help you get started as well.

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