Updating from 4.26.2 to 4.27 has made areas in shadow almost black.

I need some help. I updated from 4.26.2 to 4.27 yesterday, and when I opened my project, the areas of shadow in the exterior have become near black. I hadn’t changed anything in the scene, just opened it in 4.27.

I’ve recompiled shaders, rebuilt lighting, deleted the DerivedDataCache. Nothing worked.

For anyone else who ends up with this problem: I ended up discovering that the SkyLight in my scene was the culprit.

It was set to “Static”, and was working just fine in 4.26.2, but updating to 4.27 messed it up for some reason. The solution was to set the SkyLight to “Stationary” and rebuild lighting.