Blending model edges


I am trying to make my scene look nicer. Currently the models look too sharp against the background and each other so I would like to blur their edges somehow.

The approach I thought of would be to use blending with:


However this will blend the entire model with whatever is behind, so is there a way to restrict the blending to just the edges? Or is there a better approach to make the models look more natural in the scene?


Use multisampling.