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Why am I seeing shadow spots on my custom mesh?

So I'm getting a very strange effect of having a square or diamond shaped shadow baked into my meshes when I build lighting and I can't for the life of my figure out what's causing it. Its happened to several of my custom meshes.

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I've been using UE4 to create the lightmap unwrap rather than doing it inside max. Maybe this is a glitch with the generate new UVs? Also I'm only building with preview lighting.

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asked Jul 31 '14 at 08:18 AM in Rendering

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avatar image Jacky Jul 31 '14 at 01:32 PM

It is not a glitch, UE4's UV generator just isnt good enough for every object so you need to make them in your modeling software.

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Here is a basic tutorial about how to create a lightmap: https://www.youtube.com/watch?v=z5yc-bKbHyc and here you can find more information: http://www.worldofleveldesign.com/categories/udk/udk-lightmaps-01-basics-and-important-principles-for-creating-using-lightmaps.php When you dont get any errors after you have rebuild the light, it could also be that your lightmap resolution is just too low :)

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answered Jul 31 '14 at 02:07 PM

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I had such issue on landscapes (this was my first problem in UE4 :) ), Cascaded Shadow Maps on the directional light helped

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answered Jul 31 '14 at 01:03 PM

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avatar image TorQueMoD Jul 31 '14 at 07:21 PM

Thanks guys! I understand how to create lightmap unwraps in max, problem is they always seem to have weird issues where it tells me there's overlap when there isn't any. Never figured it out so I just thought I'd do it inside UE4.

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