Trouble with build and lightmass importance volume

Hello !

I have a problem when building my map : as soon as I put a Lightmass Importance Volume in my map, the build process never end (stuck somewhere between 90 and 97%) and when I delete the volume the building process run really fast (5 secondes). The map is a fully closed room, with 5 statics mesh and 1 point light.

I tried to run the process without skylight, his directional light and atmospherique fog, but it didn’t change anything …

Thanks for reading !

Ok so it’s fine ! I found what was the problem : the lightmass was too small …