See the Pen
Musical Theremin by Joshua Dzombic (@Killacorp)
on CodePen.

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Text des Schöpfers:

,, Spray paint the wall, or bomb it with a marker 🤘

It loads 2 versions of the wall, a normal one and the specular map version.
In the composite function it does magic with drawing on multiple canvases with different globalCompositeOperation, to eventually combine it all 🧙‍♂️.”

– Pimskie

Sonst habt ihr da keine usability. ;o