UE4 Error wrapping UV

Hi, when I’ve finished to renders the light i get this problem:


Can someone help me?f4abc489d9ec948e571defacf5c80196aa12cf2e.jpeg

Your objects have a second UV channel which is used for the lightmaps, they can’t overlap since all surfaces need unique lighting:

You’re going to need to redo your lightmap UVs so that they aren’t overlapping. Either manually in your modeling package of choice, or through the engines automated function (though this isn’t perfect).