# Light Leakage Problem

**URL:** <https://forums.unrealengine.com/t/light-leakage-problem/2250825>\
**Category:** World Creation\
**Tags:** sun, unreal-engine, editor, Rendering, Lighting\
**Created:** [December 30, 2024, 5:34pm UTC](https://forums.unrealengine.com/t/light-leakage-problem/2250825 "2024-12-30T17:34:21Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![TrojanWEQ](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@TrojanWEQ](https://forums.unrealengine.com/u/TrojanWEQ)\
**Post date:** [December 30, 2024, 5:34pm UTC](https://forums.unrealengine.com/t/light-leakage-problem/2250825/1 "2024-12-30T17:34:21Z")

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![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/9/3/b9343388cd7ca46674f47515c75c39dd87aef059.png)  
 ![image2](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/8/a/38ad60f52c484ee4d49531e71e4015029a9bb73b.jpeg)

Why does the light leak like this? There is Only Sunlight on the map. but light is leaking from this corner? moreover there is no error in Modeling. i checked everything everything is normal. i tried with different materials the problem still persists.

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**Author:** ![ZacD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ZacD](https://forums.unrealengine.com/u/ZacD)\
**Post date:** [December 30, 2024, 5:45pm UTC](https://forums.unrealengine.com/t/light-leakage-problem/2250825/2 "2024-12-30T17:45:50Z")

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Try using light blocking boxes around the problem area, at least 20 cm thick if possible.

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<div class="post-metadata">

**Author:** ![TrojanWEQ](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@TrojanWEQ](https://forums.unrealengine.com/u/TrojanWEQ)\
**Post date:** [December 30, 2024, 5:54pm UTC](https://forums.unrealengine.com/t/light-leakage-problem/2250825/3 "2024-12-30T17:54:33Z")

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I can’t find that

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**Author:** ![MostHost\_LA](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/mosthost_la/32/907035_2.png) [@MostHost\_LA](https://forums.unrealengine.com/u/MostHost_LA)\
**Post date:** [December 31, 2024, 3:56pm UTC](https://forums.unrealengine.com/t/light-leakage-problem/2250825/4 "2024-12-31T15:56:29Z")

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You cant find a box? And stretch it to size?

Even then, the leak is because your geometry is non manifold. That’s all there is to it.

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**Author:** ![Nader1328](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Nader1328](https://forums.unrealengine.com/u/Nader1328)\
**Post date:** [April 3, 2025, 2:56pm UTC](https://forums.unrealengine.com/t/light-leakage-problem/2250825/5 "2025-04-03T14:56:03Z")

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But, same problem with the model is coming from REVIT via direct link. No such problem when rendering in REVIT, or in Blender via Speckles, or using a farm for REVIT rendering files.