A warning message appears when multiple light sources are used. Warning message states to adjust forward shading priority. Where is forward shading priority changeable?
Shading priority is changed by looking into the details of one of your light sources by going to Light → Advanced → Forward Shading Priority and adjusting the value as needed.
I know it’s an old post and you’re probs sorted, but here’s a reply for people searching (like me) while they’re learning UE…
It’s basically if there’s more than one high priority light source (for example an HQSky skylight and a Directional light in my scene) where UE isn’t sure which one does the main shadow and lighting. Set the main one to 1 and the other to 0.