moor_tarn

The tarn in the hollow: dark peat water that holds almost no light of its own and gives the sky back at a grazing angle.

It shades itself rather than asking the engine for PBR, because a flat mirror of a flat sky is one colour across the whole pool — the drifting ripple normal and the fresnel are what make it read as water. The sun's own path across it and the light line's reflection are added on top; game.world.Dawn pushes sky_col from the ramp's horizon colour so the pool always reflects the hour the sky is actually at.