The only model I’m familiar with is diffuse lighting but this look way more complicated than that.
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The only model I’m familiar with is diffuse lighting but this look way more complicated than that.
Each square has a light level from 15 to 0. Each level is 20% less than the level above it. If a square contains a light source it gets the luminosity of that light source, otherwise it gets one less than the brightest neighbor.
Sunlight is special, it suffers no vertical attenuation.