1) get rid of
photons {
global
refraction on
reflection on
}
in the second light source and change the light source's brightness to White
instead of White*2.
2) change the pigment of the isosurface sphere from
pigment{rgbft <1,.9,.9,1,1>}
to
pigment{rgbf <1,.9,.9,1>}
3) use this for your photon count:
count 5000
-Nathan
