Problem with lighting and modular walls/seams/clipping

It’s exactly the same model I made with 3dsmax, aligned with vertex snapping in UE4. How can I avoid that seam?

When I push them into each other, I have clipping/flickering, if I snap them, I have that seam. The wall segments are all differently bright and I don’t get why.

And: Is there something wrong with using BSP brushes instead of imported models?

Hi!

This is a known issue when using the modular elements. You need to decrease Static Lighting Level Scale to 0.1 and increase Indirect Lighting Quality. You will then get more samples of the light and the light will be built more accurately.

This thread contains a lot of tips and tricks on how to fix lighting of modular elements.

Thank you so much!