Window frost grown by diffusion-limited branching — tips that run away from flats — nucleated on scratches in the pane, with the colour coming from refraction through crystals rather than from the ice, which has none.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and audio-reactive.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.