for(float i,d,z;i++<1e2;){vec3 p=z*normalize(r.xyy-FC.rgb*2.)-1.;d=max(p.y,0.);p.y-=d+d;p.z+=t;z+=d=.3*(.1*d+.01+length(vec2(cos(p.z*6.)/6.,1.-dot(cos(p),sin(p).yzx)))/++d/d);o+=(cos(p.z+vec4(0,1,3,0))+1.5)/d/z;}o=tanh(o/8e2);
for(float i,d,z;i++<1e2;){vec3 p=z*normalize(r.xyy-FC.rgb*2.)-1.;d=max(p.y,0.);p.y-=d+d;p.z+=t;z+=d=.3*(.1*d+.01+length(vec2(cos(p.z*6.)/6.,1.-dot(cos(p),sin(p).yzx)))/++d/d);o+=(cos(p.z+vec4(0,1,3,0))+1.5)/d/z;}o=tanh(o/8e2);