Lighting issue in ue4

baccene

What is causing these shadows to repeat themselves in every instance in my modular mesh? It looks fine until I build. I made my own lightmaps in Maya and ue4 is using them. All edges are snapped to grids etc. The maps are good to go... What other factors could be causing this? 
Thanks so much,
-Trav

schmigel

This  will always happens between modular meshs. Just because they don't share the same baked texture.
One way to avoid is to create one larger mesh. But that destroys the modular worklflow.

Other way is to change some settings in the World Settings.
-Indirect Lighting Quality 2 or higher should work
-Decrease ndirect Lighting Smoothness to 0.6
(maybe you'll need to decrease lightbuild scale)

All those change will increase the build time.

You can find more detailed explanations in this forum post:
https://forums.unrealengine.com/development-discussion/content-creation/18356-modular-asset-lighting-problem