http://nitter.qwik.i2p/zozuar/status/1461524656532471811
yonatan (@zozuar): " float i,e,a,l,y;vec3 p,q,d=vec3((FC.xy-.5*r) / r.y,-1);for(d.xz*=rotate2D(t*.2);i++ < 2e2;e=max(min(++y,-e),y-3.)){i > 1e2?l=log(e+=1e-4) / 1e2,d / =d,o:o+=exp(-e*1e3) / 2e2;p=q+=d*e*.7;p++;y=p.y;for(a=3.