Why do I get these Artefacts

Development Rendering
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1

I model my meshes in Blender. I do the 2nd UV-Map for the Lightmap and assign that to the right channel etc., however, I still have these ugly artefacts allover my meshes. Please help!

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96227-unbenannt-7.jpg871×1294 19.8 KB

2

Thanks a lot. I really needed that information! I will try it out tomorrow (Europe).

3

Hi Achnequark,

That’s caused by the the layout of your UVs for that meshes lightmap and a having a lower lightmap resolution.

For faces that need to have continuous lighting smoothly across them you will want to set up your UV so these faces are connected.

I would recommend taking a look at the documentation here: Understanding Lightmapping in Unreal Engine | Unreal Engine 5.1 Documentation

Also Warren has a really good demonstration of setting up Lightmaps for UE4 here: Quick Tip #19 : Lightmapping - YouTube

I hope this helps!

Tim