I suppose it’s because of ray tracing or something like that. How can I disable it? I’m ready to sacrifice accuracy for more good looking result. I’ve tried to disable “Cast Ray Traced Shadows” parameter in material settings, but I can’t see any difference…
Disable “Affect Indirect Lighting.” within the actor blueprint or mesh, it might be “Affect Distance Field Lighting” but I’m not sure. It should definitely be one of the two. If that doesn’t solve it, you will probably have to set up an actual light instead of an emissive material.