Experiments with Fable

Small, self-contained graphics experiments — each one a live demo plus a write-up of the math behind it.

• Black hole

  A Schwarzschild black hole ray-traced in a single WebGL2 fragment shader: real geodesic lensing, the photon ring, and a relativistic accretion disk. how it works →

• Spinning black hole

  The Kerr metric, integrated for real: frame dragging, the D-shaped shadow, and a disk that reaches three times closer in. Sweep the spin with a slider. how it works →