Problems with light building

Hi! I have a problem with the EU4. To build light the percentage does not rise, it remains at 0% and not built me. You know why you can be.
I tried it with models of all kinds.

-add a lightmass importance volume to your level
-double click on the “swarm” systray icon - check if there is something moving
-set your light build quality to preview
-what are your specs
-which kind of meshes do you use? (have you also tested the ones from the starter content)? :slight_smile: