I remember reading something about O(2^n)... That may apply to the cost of making the illusion appear real: it doesn't scale. It may be that instead of looking

I remember reading something about O(2^n)... That may apply to the cost of making the illusion appear real: it doesn't scale. It may be that instead of looking at rendered photo-realistic grass, one may be better of going out touching the real thing. As for the artificial realm, who cares if it isn't photo-realistic? It is artificial anyway.