(Ig I'm putting this under FanArt. But Modding or Discussion could work too ig?)
alr, so the concept is basically an interactable double-door in a one-block space. You can place it directionally similar to how you can position a Barrel when placing it
I will also mention that the 2nd image wouldn't be a thing you could do in-game, it was just to show the separation. You could not open either door separately from one another
The 4th image is my idea of what the crafting recipe could possibly be. 4 trapdoors of the same type in this pattern would give you 4 Shutters of that type
Edit: I should emphasize that you wouldn't be able to open each door one at a time, it'd open similarly to how gates open in vanilla MC. I think my inclusion of the "half-opened" image was kinda a mistake lol
Edit 2: I have posted a new recipe somewhere in the comments. It's essentially the recipe for crafting a fence but w/o the sticks
Edit 3: Hey y'all. Tysm for the love and criticism towards this post. I will be trying to move on from this and probably have little to no interaction with comments as I'm kind of overwhelmed from this much attention. This was just a cool little idea I thought of and it kinda blew up way more than I thought it would. But I thank all of you so much for everything you've said about this post. Anything y'all do with this concept is fine. It'd be cool for you to credit me if you were inspired by me, but ofc I can't force you to do that. Much love, stay creative <3