Generate lightmaps (in a clever way)

[ikbensiep]

• [ ] Investigate if a (much) smaller version of the track layout can be generated, used as a light brackground-image over a dark background-color and scaled up to match the world's dimensions. With a bit of luck this could give you some "free" irregularities because of upscaling pixels.

• [ ] After this, investigate if the graphics in the #elevated layer can be duplicated and used as an inverted mask, to block out lights on building corners etc.

• [x] Implement day/night cycle by animating either this entire layer's opacity, or only the background color

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previously, in this issue:

This super simple effect can add dramatic night time lighting:

1. create an element to cover the entire world (ie, ::after)
2. add a dark (blue) background color and add a repeating background-image with a radial gradient
3. set this (pseudo) element's mix-blend-mode to multiply

Yields:

Not bad.

However, to have light around the complex shapes of a racetrack, a repeating pattern won't do.