Crash occured after the light building process was completed. I pressed ctrl+s, and then it crashed. Crashes started to appear after i added some extra static meshes. These were the meshes from store (Open World Collection Demo) and some self-made (couple of simple low-poly houses and fences) meshes. I could spend some time deleting potentially problematic geometry, rebuilding lights and so on, but light builds are taking about 12 hours. Unfortunately, i’m very tight on time.
Hi avrora-games,
We recently fixed a crash (UE-12184) that sounds similar to this with CL-2493533 and will be included with 4.8.
The reported problem was due to saving bulk data generated. There was a data loss conversion that was causing this crash when files were big enough.
You can try lowering the lightmap resolution of the trees from the Open World Content. Those trees were made to be used with Dynamic Lighting and the lightmap resolution on them is extremely high at 2048. Lowering this to 512 should give much better results with quicker light builds.
If you’re not already using a lightmass importance volume in your scene this would be a good thing to have as well.