Here is my abridged version of the very lengthy tutorial found here.
- Download the Sobel Edge .UPK package.
- Open the package in UDK.
- Ignore the blank materials, and click the Post Processing Chain, so that it is highlighted.
- At the top of UDK, go View > World Properties > search for "world post process chain" (or find it under the Rendering tab). Click the green arrow, and It should update the post processing effects in your world!
|With Sobel Edge shader|
|Without Sobel Edge shader|