procedural_sky

The editable atmospheric sky: a day/night gradient with a sun disc and glow, a procedural star field, and a moon opposite the sun, authored entirely from material properties — no texture backs it.

Day, night and the dawn/dusk blend all derive from the directional light's elevation, so the sky follows whatever drives the scene's sun; there is no time-of-day uniform. The gradient's zenith, horizon and ground colours, the sun's size and intensity, the stars, the moon, turbidity and exposure come from properties.yaml.

Output is radiance scaled by exposure — the scene's own tone-mapping does the range compression, the same contract as every sky-domain shader.

The ProceduralSky component owns the runtime material over this shader (__procedural_sky) and pushes its fields here; sky.get() reports the resulting configuration.