Ahhhh, that makes sense. Yeah, it's probably custom DECORATE stuff. Here are the X/Y coordinates for one example from E5M3, confirmed it just before writing this post:
X: around -13500
Which episode 5 is this? The Lost Episode or...?
Sorry, yes, "Out of the Aeons" in Strange Aeons, https://www.impie.drdteam.org/SA%20Download.zip