As per title. Found this mod floating around in Valhesia 3 and thought it would have been cool if the glass panes could align to the top and bottom of the blocks rather than just the sides.

Horizontal Glass Panes are coming soon!

Horizontal panes are now available in versions from 1.18 onward

That's been on the To Do list for a while. It would require a substantial refactoring of the mod and would break existing player builds. I've been looking at adding horizontal panes as an option but they wouldn't have the same integration into a single block space.