Static shadow artifacts

Hi everyone, im having lighting problems in my project, this artifacts appear.
My columns are not casting shadows, and this black “shadows” came from nowhere ramdonly from some lights. All lights are statics. I´ve solved this by changing from static to stationary, but i cant overlap and i wanna use static lights.

Also in the last image, my light dont bounce, anda i have a indirect lighting intensity of 30.

Someone could help?

yes, I baked in medium quality

I usually don’t use static lighting so my knowledge on it low, but have you baked your lighting?

Hi!

I’m guessing your building is a huge mesh with a low ligtmap resolution…
Could you show us the lightmap uv of this floor part if I’m wrong and everything is nicely a separate object?
…but then again: it will be a lightmap resolution problem!

The problem was that I had a translucent mesh casting shadows.
But I continue with the problem of the last image " in the last image, my light dont bounce, anda i have a indirect lighting intensity of 30"