Filaments traced from a centre electrode to the inner glass along a curl field. The loudest band names an angle on the shell and every tendril bends toward it, so a dominant element gathers the discharge into a bundle the way a hand on the glass would.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and plasma.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.