firstlight

The hour between deep night and first light, written as a ramp.

M.at(light) reads the whole environment off one axis — FL.light(), 0 in the dark and 1 when the light has filled the floor — and hands back the sun's direction, colour and strength, the ambient, the sky's time of day and its three colours, the height fog, the marched air the shafts come out of, and how much of a cover pool the light has eaten. Three keys: deep night, first blush, first light. Dawn.component pushes what it returns at the scene every frame.

M.keys() hands back the keys themselves, for a tool that wants to render the ramp rather than fly through it.