OK, I have been working on my first ever SMW hack and I wanted to change the BG in the Switch Palace to this: SMB3 Question Marks
I inserted the ExGFX correctly and saved the GFX to Map16. The background appears fine in Lunar Magic but when I test it in the ROM itself I end up with this garbage in ALL the levels:
I'm playing this in ZSNES 1.51.
Is there any way to fix this?