Tip: After editing your overworld, make sure to use an EMPTY save file, as save files with progress may load Mario's position based on previous versions of the overworld. Note that altered level flags will also only take effect on new save files.
This patch changes the Ghost House Exit sprite (sprite 8D) to draw its tiles based on its position, rather than using hardcoded values, which allows you to change where it's drawn with Lunar Magic (since it'll always be displayed on the hardcoded position in LM, turn on "Sprite Data (Hex Code)" view to see where the sprite actually is and to move it around). This also allows to place more than one instance of it in the same sublevel (doing so requires NMSTL patch/SA-1 to avoid tiles disappearing).
You can also edit its tilemap from the patch, and also remove/add tiles to it (since it uses 34 ROM bytes less than vanilla, you can add up to 8 tiles to its tilemap).
This also fixes a couple bugs from vanilla:
- Part of the right door appears on the left of the screen when the door is too much offscreen horizontally.
- The tiles always appear at the same Y position even when scrolling the screen vertically.
Appears to not work on the original vanilla ROMs, possibly because of the sprite memory header used. Make sure to change it in case you wanna stay with the original rooms.
Being one of the potential few people who care about such small vanilla details as the ghost house exit sprite, I'm glad you made a patch to make it more flexible rather than outright make a custom sprite based on it.
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