Board Thread:Fun and Games/@comment-3179363-20131112084028/@comment-6697950-20131129224710

It is possible for natural fluctlights to produce offspring in Underworld, but, as all Fluctlights in the SAO universe are identical in their earliest development stages, the only thing that can be used to differentiate an artificial Fluctlight from a natural one is whether or not they have their own body in the real world. Even if you have offspring in Underworld, it doesn't mean that they'll grow a body in the real world too. There's also the fact that anything artificial can't be 100% identical to the natural one.

@C9 There's is some kind of system in arificial Fluctlight reproduction that simulates how gametes work in the real world, but I doubt that it is anywhere near the complexity and randomness of the real thing.