Shader Forge has an outline mode built-in to the shader editor, worth a look if you go back to this. Shader Forge is really very easy to use, if you've ever used any node-based editors, like Hypershade.
Shader Forge's outline node is good for visualization and a very standard outline effect, but I wouldn't use it for final production. SF's node suffers from: * Broken outline based on uv seams. A simple fix by having the shader read from a secondary uv channel where the entire model is planar mapped, but the SF node…