A raymarched mountain range whose ridgeline is the spectrum itself: bass lifts the peaks, mids erode hills into crags, highs raise the sun and set the snow sparkling, and a mirror-flat lake below carries the whole range back with god rays through the valleys.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and raymarch.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.