I don’t think the Indirect Light slider is working for skylights or directional lights at the moment. I’m assuming that’ll be in the final build though. From my testing only the other local light actors work with variable indirect lighting for now (Point, Spot, etc.). You could try and add some of those to your scene to get the bounces you’re after. Be careful of performance though, If they’re just for bounced light you could try them without shadows.