Something I had made sometime ago on Material Maker - www.materialmaker.org
Playing with MFSDF and a simple wave displacement
The code is on https://www.materialmaker.org/material?id=577
Uses my MaterialMaker lib 0.4 at https://github.com/paulofalcao/MaterialMak...
I also exported it to Shadertoy https://www.shadertoy.com/view/mdXXWM