Many people are interested in having a Cel Shading/Toon/Borderlands-style shader effect as part of their level in Unreal Development Kit. It's a cool effect that really brings your level to life by making ordinary static meshes "pop out."
Here is my abridged version of the very lengthy tutorial found in another documentation source.
Click here for the tutorial on my blog!
After Sobel Edge
Before Sobel Edge