So I was working with Directional light, and dark spots appeared on my scene. They look ugly. I fixed, but with a lot of hassle. Suddenly a though struck me. What if Godot used sobotka's Open-Source, Blender plugin, filmic for the lighting engine.
It's a very helpful plugin. photorealism or not, this fixes a majority of lighting issues. It'd be awesome to see it implemented in a game engine.
Here's a link to the Github page
Also I thought I'd show this video off. It's for blender, but the first 13 minutes can be applied virtual light in general.