Lit appearance of meshes flash automatically


I’m doing a project about a cloth shop where there are more than 200 static lights. Sometimes after building the light, some meshes in the scene flash automatically and the shadow of the meshes disappear. I don’t know what causes this issue. If somebody knows how to solve this problem, please tell me. Thanks in advance.

Make sure that the lightmap resolution of the mesh that should receive the shadow is high enough + do you get any warnings after the light build? :slight_smile: