Image Gallery Test
float i,j,d=.1,e; vec3 p,q;
for(i=0.;i++<64.&&d>1e-4;){
p=vec3((FC.xy-.5 r)/r.y,e)e2.;
p =rotate3D(t,q=vec3(-10,6,3));
for(j=0.;j++<6.;)
p=abs(abs(p q-.1)-.2)-.2,
p.yz =rotate2D(t*.5),
d-=min(d,dot(p,p)) smoothstep(-2.,2.,.01),
e-=d;
}o+=vec4(1./exp(p p),1)*3./i;