Nvidia RTXGI with too dark areas

Hey guys, I’m testing the Nvidia RTXGI plugin for UE 4.26.2, and I need a little help.
Is it common using SkyLight to “fake” light propagation when GI doesn’t do a proper job? Sometimes there are too dark areas.

I’m working on some scenes and it seems to be too faky when I use SkyLight. What should I need to care about? Any tips, please?

Thanks in advance!