This tool provides advanced controls over 2D background lighting. It lets you decide which areas are lit up and which areas are dark.
It is optimized for mobile and doesn’t use any realtime light calculations. Instead the light information is calculated beforehand and baked into the vertex colors of the background.
With these tools you can set up a background plane, bake the lights onto the model and add extra effects like vignetting and anti-lights (lights that take away light).