Have you tried increasing your pagefile size on your PC? Larger pagefile = more available memory, its slower than it would be if you add more RAM but it should still work. PM me if you need to know how to do it (PC, not MAC). Robot looks cool, wires?
Grim: instead of trying to go any higher, break off limbs on the dragon, man. Just bake the normals from zmapper and combine them on the map later... or build a new low poly from scratch. Anyway, this robot is tight like whoa. Nice work man. There's a lot of random details, though. Still enjoying it.