Spherical Geometry Lab

Geometrical optics only

Optical model

Choose source drawing

Comparison

Transformation opacity

Original overlay

Show original as red construction lines Show spherical aperture

Geometry guide

Latitude / longitude graticule

Graticule opacity

Angular spacing

Hollow globe parameters

Refractive index

Shell thickness

Distortion strength

Atmospheric / radiometric optics

Enable atmospheric optics

Peripheral blur

Edge reflection

Edge haze / veil

Chromatic dispersion

Gloss tint

Rim highlight

Geometry is solved first. Atmospheric optics are then applied as a separate appearance pass: peripheral defocus, Fresnel-like edge reflection/veil, dispersion, tint and rim response. These controls are intentionally separable from the geometrical model.

Hollow globe