I’ve written a 6,000 word step-by-step tutorial on how to create the effect. I also managed to simplify the graph node a little. The blog post will be targeted at beginners to the material system, but will include a project containing the material for anyone to download. It should be up this coming week some time, possibly the following week. I just need to wait for it to go through a few rounds of editing and then it’ll go up on the company blog.