Lighting in Large 3D Scenes

Here’s an image of my 3D Globe application, stripped down to just the bare top level map tiles. The uneven coloring is from the lighting setup in the WorldEnvironment node settings, and is something I’d like to improve.

I have a real world diameter (6,500Km) and a GameEngine diameter (1000) and scale between the two, so the 1000 is an arbitrary number.

Under “SDFGI” I can increase distances to smooth out the unevenness, but this degrades the shading of a car or plane I would draw at the correct scale. I also see this unevenness in wedges I draw for a cars field of view.

Does anyone have any tips / best practices for setting up the lighting here?