Camera Output Blending (Camera Depth)

Hi

I would like to know if its possible to combine the output of 2 cameras such that they are blended together to form the final rendered scene?

In Unity this is a relatively trivial thing to do. By making use of the “Camera Depth” parameter it is possible to layer up the output of many cameras to produce a single rendered scene.

The reason I need this is that I want to render a 3D mesh elsewhere in the world with an animated camera, and then overlay this render onto the main game camera to produce an augmented reality-like effect.

Can anyone tell me if this is possible?

Thanks

Mike