Crown Glass Dispersion

Physically-modeled dispersive glass, not tuned by eye. Refractive indices per channel (R 1.5152 @630nm, G 1.5194 @532nm, B 1.5240 @465nm) come from Schott N-BK7's real 2-term Cauchy fit (A=1.5046, B=0.00420 um^2), checked against N-BK7's published nF/nd/nC index values to within 0.00003. Channel tint colors are the CIE 1931 color-matching function's actual response at each sampled wavelength (cross-talk under 0.001 at these three wavelengths, which is why the tints land on near-pure R/G/B rather than an arbitrary choice). Uses the standard three-IOR additive-Glass-BSDF technique for Cycles/Eevee, since neither renders true spectral dispersion by default. Same Cauchy/CIE code already shipped and tested in Caustify's spectral-core package.

A separate paid pack (all five materials — N-BK7, N-SF11, diamond, moissanite, sapphire — plus a ready-to-render Cycles demo scene and labeled dispersion close-ups for each) is on Gumroad: https://laterrr.gumroad.com/l/mnziiy. This BlenderKit version stays free and unchanged.