Moonlight Polarization in a Hazy Sky

Just like sunlight, moonlight scattered by air molecules becomes linearly polarized — and the pattern is real, measurable, and used by some nocturnal animals for orientation. This 3D sky dome computes the exact Rayleigh single-scattering polarization degree and axis at every point relative to the Moon's position, colors the dome by degree of polarization, draws the local E-vector orientation as a field of tick marks, and lets you dial in haze to watch multiple scattering wash the pattern out, or sweep a simulated polarizing filter across the sky using the real transmission law.