Hey bro, how's it going?
For the mirrors, there are two possible approaches: you can add them as events and use tags like `<door>` to ensure the event appears in front of the wall, or use a plugin command to set the sprite as a "facade." As for the steps, I'll need more details to understand what's going on.
Do you use Discord?
Okay so I made an event on the overworld map with no icon or anything, but it calls the create facade and I point it in the image folder to the file called mush... its a mushroom house and yeah it is png.. I set it up for all sides and same image on all sides.. but it never shows up. if I choose a map tile from the overworld THAT shows up and overrides the facade. does this not work in overworld?? I'm trying to make a mushroom house entrance.

So this is how it shows up. I used the castle image because I know it works in the demo, and I used the ceiling blocks instead of walls, neither would work as you see, I made the 3 block high stack as suggested and made the facade as you see with castle, and it is parallel with a self switch, but for some odd reason it's not showing the facade.