Trying to make Toon Shader Material on UE4

Neither of these tutorials actually go through the whole process, they only show certain functions of it. So I’d like to continue this thread to help figure out how to create a cartoon look like this in UE4.

What I have played with so far, is UDK tutorials such as this. But before I simply port that over to UDK, I’d like to experiment with what Jordan explained with the outlines, so far I have turned on CustomDepth and used it to visualize the depth as he shows in his tutorial. But now how do we use that Depth information, to create an outline around the object?

I’ll be working on this all weekend so I’m open to all suggestions.