I have encountered the problem that Lumen seems to calculate the shadows only within a certain radius. This causes the shadows to appear hard when flying over larger objects. The Scene is part of an Animation, so i already use the cinematic quality setting and render using movie render queue with game overrides enabled.
I have already tried every possible rendering setting in the PPV and also a number of console commands, but nothing has helped so far.
Lumen alas only handles indirect lighting (GI and reflections), what it looks like you’re experiencing is a direct lighting problem.
The solution of it will depend on your shadowing method. If you’re using standard shadowmaps, you’ll be having issues with the limits of the cascade length. I’d first switch to virtual shadow maps, as no matter what, you’ll have coverage.
If you’re using RT shadows, you’ll need to figure out some way to extend the ray and BVH length to cover those further distances. I couldn’t tell you exactly what commands would do that, but imputing HELP into the console should generate a file that will let you find what you need.
It is quite interesting; because of how lumen works, there can be circumstances where lumen is accurately bouncing light and rendering reflections to a place that isn’t under any direct shadowing.