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Overlapping UV's

Hey guys, I have a problem with overlapping UV's. Every single object in the level goes full retard after building the game, here is an example: Unbuilt - alt text

Built - alt text

Build errors - alt text

I'm a beginner with ue4 and the guy who made all the custom objects is a beginner as well. We can't seem to figure out how to fix this problem. We have found a couple of tutorials on how to fix this issue however none of the solutions seem to be working. I'm honestly not sure if the UV's are the reason why objects become like this, i hope someone can help me fix this. Thanks in advance!

Product Version: UE 4.15
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asked May 22 '17 at 01:28 AM in Everything Else

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Overlapping uvs means that uv shells in your models overlapped with each other. To fix this you need to create 2nd UV channel where all shells layout without overlapping each other and fit to 0-1 space. Then in mesh settings set lightmap uv channel to index 1.

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answered May 22 '17 at 06:35 AM

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avatar image ukiW May 22 '17 at 12:24 PM

Hello, I tried doing that. I don't know why but all objects already have a second channel and the channel is set to 1 by default. I tried deleting it, re-adding it and doing what you just said but it didn't fix anything. I also looked up a couple of tutorials with the same/similar problem but it didn't help.

avatar image redbox May 22 '17 at 12:28 PM

Do you use distance field shadows?

If yes - it may be caused by low resolution of mesh distance field data. you can fix it by increasing distance field resolution scale in mesh settings.

avatar image redbox May 22 '17 at 12:29 PM

can you show 2nd uv channel of any wrong mesh? inside editor.

avatar image ukiW May 25 '17 at 08:47 PM

Hey, thanks for the reply! I managed to fix this by changing the objects to stationary! Although the UV's still overlap, I'm not getting the error when building but only on packing. But it's working now and I don't have any problems with it anymore (for now) Thanks for replying man, i appreciate it. :)

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