It seems like I come back to my old GameMaker examples and update one of them about once a year. I try to do better than that, and probably do, but that's how it feels sometimes!
Anyway, today I updated my example of a textured vertex path in GameMaker: Studio. I've spent some time removing a lot of the code that didn't need to be there, renaming some variables and assets so that they make a little more sense, and adding comments all around.
Check it out on my GameMaker: Studio Examples & Tutorials page.