Problem description:

How would one give an atomic object a different layer for a client?


Start
We have a map with a rock and a tree.
Player 1 and Player 2 are on the same turf.

Start
Player 1 sees the tree in front of rock.
Player 2 sees the rock in front of the tree.

End

Edit: Sorry just noticed image proc (layer argument).
So same way to display images per client.