     lin += .4*amb*vec3(.4,.6,1.)*occ;
     lin += .5*dom*vec3(.4,.6,1.)*occ;
     lin += .5*bac*vec3(.25,.25,.25)*occ;
-    lin += .25*fre*vec3(1.,1.,1.)*occ;
+    lin += .25*fre*vec3(1.)*occ;
     col = col*lin;
 
     col = mix( col, vec3(.8,.9,1.), 1.-exp( -.0002*t*t*t ) );

  return vec2(sdBloodCell2(
    opRep(
      pos,
      vec3(1.0, 1.0, 1.0)
    )
  ), 54.0);
}

        pos
      //)
      ,
      vec3(2.)
    ),
    0.1), 0.0
  );
