Glitch art is wonderful. It has the potential to be beautiful and horrifying. The best is often both at the same time. It’s got so popular now that most of us can appreciate glitch art on a visual level. But when it comes to talking about it, well, we don’t really have a clue. There isn’t an established vocabulary surrounding glitch art so we’re left to just say “wow” or “wtf?!” We can do better.  One person who is helping with that is Tokyo-based artist UCNV. He’s delivered a document that aims to help us understand how to glitch PNGs. If…