Shadows incorrect after light build. Patchy artifacts

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123816-ue.jpg
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Hi,

I wanted someone to help to understand an issue with the below jpg i have attached. The polygons turn out to be patchy when lighting is built, be it medium high or production. Needed to know if it is an issue with the normal of the surfaces. If so can i reverse the normal in Unreal. PS : i had given compute normal while importing the polygon. Please help me out with the same.

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Hi Pragunn,

From just seeing the results you have here in the image my best guess would be a bad layout for your Lightmap UV that doesn’t give you a good light bake results.

For reference here is our documentation for lightmapping: Understanding Lightmapping in Unreal Engine | Unreal Engine 5.1 Documentation

-Tim