Light Delta v1.0

A Chisel plugin that allows you to add to the normal light intensity for a given light, without changing that light... vastly reducing the number of lights needed. (The demo map included shows 11 distinct lighting effects... and it uses exactly ONE light.) It only works on walls, and a wall can display only one value of the ambient delta field... but if you're building complicated levels, and have run into lighting limits... check this out.

Levels in map "Light Delta demo map":
Light Delta demo map