A Link to the Past Glitches - Reality Overlap
- Perform the Death Mountain Descent.
- Enter a dungeon and die(don't have any Fairies to revive you).
- When you reappear at the start of the dungeon, exit.
The Light world music will be playing instead of the Dark world music. If you scroll to a different screen and then scroll back to the original screen you'll now be in the light world but with some Dark world tiles. Dungeon four apparently gives good results.
Viewing the Map will change some (but not all) of the tiles back to normal.