Well, it is true for photon mapping, but sky lights are not handled with PM in the official Lightmass, so is it here.
Edit: it may be better to use PM for sky lights, but that is a little bit complicated for me to implement… 
Well, it is true for photon mapping, but sky lights are not handled with PM in the official Lightmass, so is it here.
Edit: it may be better to use PM for sky lights, but that is a little bit complicated for me to implement…