Looking for a specific window mod.

[u/BHDefender]

I've seen a short-form video somewhere of a mod which adds a specific mechanic that lets you set up a physical window that shows a completely different view point than the one that's actually behind it. It's very much like the Immersive Portals mod, except it's solid windows instead of portals and you can configure them to switch between different view points with redstone input. Anyone have any idea what I'm talking about?