Sorry I might not understand what you are saying.

You're in the game and look at a house, then you turn around an look at a tree, so you need the geometry and texture of the tree, but no longer of the house. Then you look down and a chicken walks into frame, so you now need that, you kill the chicken and suddenly need the dying chicken animation etc.

Almost never you need all data for a single frame. That would be way too much work for the render pipeline anyway.