Comment 10 for bug 1411958

One more observation: (Planet.cpp, line 1244)
    lum = cosAngleLightNormal;
instead of original
   lum = max(0.0, cosAngleLightNormal) * (A + B * max(0.0, gamma) * C) * 2.;

produces nice non-flickering night Moon image, but it is not so good for day times.