I guess the viscosity of the resin prevents structures of certain size from sinking? I assume you would still need to try to print it in a way where "heavier" structures are done first on the bottom and work your way up?
Unless the fused bits transmit light exactly the same as the unfused bits, you would need to build up from the bottom, or anyway starting farther away from the light source, regardless.
What is the density of the hardened resin vs the stock?
It had better be exactly identical to the unhardened, or stuff will warp according to how much nearby is hardened.