Hi guys, I know this question has probably been posted before but I’m not entirely sure what to search for in the terms of my issue so I apologize in advance. I’m currently putting together a building and the length of it is a repeatable set of windows (please see attached images). The problem I’m having is that there is a seam between each of the meshes that is visible ruining the illusion of one solid wall. I haven’t baked lights yet so the screenshots are what I’m seeing in the editor currently. Any help is greatly appreciated, thanks!
You’ll want to make sure that when you are laying out your lightmap you’ll need to make sure the edges of the wall are on the grid. You can find tutorials for how to do this on World of Level Design.
There is, at the moment, a known issue that will always will leave a seam there but having a good lightmap can reduce the edge seam.
To reduce the effect moreso you’ll need to go into the world settings > Lightmass > IndirectLightingSmoothness adjusting this and IndirectLightingQuality will compensate for this.
You can see this on this thread as well:
https://forums.unrealengine.com/showthread.php?8491-Baked-Lighting-Variation-Between-Static-Meshes
If you have any other questions feel free to ask! 
Tim
Awesome, thanks so much for the quick reply!