# Where is UnrealLightmass project? (i need compile it)

**URL:** <https://forums.unrealengine.com/t/where-is-unreallightmass-project-i-need-compile-it/2538148>\
**Category:** Getting Started & Setup\
**Tags:** unreal-engine, question\
**Created:** [June 2, 2025, 9:11pm UTC](https://forums.unrealengine.com/t/where-is-unreallightmass-project-i-need-compile-it/2538148 "2025-06-02T21:11:35Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Ivan3z](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Ivan3z](https://forums.unrealengine.com/u/Ivan3z)\
**Post date:** [June 2, 2025, 9:41pm UTC](https://forums.unrealengine.com/t/where-is-unreallightmass-project-i-need-compile-it/2538148/2 "2025-06-02T21:41:00Z")

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This does works

> [@Unreal Lightmass executable is outdated](https://forums.unrealengine.com/t/unreal-lightmass-executable-is-outdated/680381/5):
>
> On Windows: Open Powershell Navigate to UnrealEngine\Engine\Build\BatchFiles Enter command " ./Build.bat UnrealLightmass Win64 Development -verbose " Worked for me.

Next time add a crystal ball with the source code. I still don’t have my divinatory powers well developed.

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