Strange lights on wall

Development Rendering
1

Hi Guys,

I am doing an interior scene, got some strange white light on a wall, which is very different to others which have same setting. Anyone knows why?

All wall in this house are imported as FBX from sketchup in one entity, light res is 512.

Thanks
Leo

2

You need to set up lightmap UV’s. Sketchup models often have issues when imported to game engines.