I decided to try to make a map that could be used to make any map for a quick dungeon encounter. Here's the result of my experiments. There is a base layer and 15 props to close any passages with them, here's how they fit:

This map were already sent to those who have been my patrons since the previous month, now you can find it at my DriveThruRPG page. If you became my patron before June and didn't receive the message with a link to it then please message me.