Hi.
I want to create “Open world” map - a space. On that map I want to create many sub-levels. Each of that sublevel is an island. It looks like flat earth. Flat on the bottom and with content on the top:) I want to create individual lights, atmosphere for each island. It should looks like our Earth. Space is dark, but earth looks light. And when you go near ground everything around you also is light. I tried volumetric fog, directional and sky lights, but each of this effect for whole level, not only for individual sublevel. Rect light, or spot light are too small to illuminate the entire large island. Additional, i can’t light “air” like in real world.
Can you give me some advice, or “key words” ?
Below got some references 
