Similar to when you select things within the engine (The small orange outline appears around the mesh - http://i.imgur.com/XoLg5r0.png ) and you can view this through others meshes and such. How would I approach doing this within game: For example if I threw a ball around a corner and then it appears with an outline around it.
Hey Felvol -
One of Community members has done an excellent tutorial about using Custom Depth for outlines and exactly what you are looking for, all credit to Tom Looman, you can find the tutorial, here Multi-color Outline Post Process - Tom Looman
Thank You
Eric Ketchum