WebGL to DCTL: JSplacement
When I discovered this shader, it was clear: it would be converted. The origin goes back to this page (https://windmillart.net/?p=products) In the meantime the great page has disappeared. But you can still download the tool. I was totally fascinated by it.
Have fun
Shadertoy:
https://www.shadertoy.com/view/wsGBzV from TekF