This is needed. I wonder if a python script would be able to change the material on all props to white and use fog as a faux zbuffer.
Yes, this would be extremely helpful.
I second Depth pass. It's almost there. All you have to do is provide a material override project wide and then we could use Fog to create the depth.
Depth pass - please give us a depth pass. With it you can do amazing things in hitfilm and after effects and the like.