Quests With Only Custom Art?

[Slightly_Seal]

I want to make a quest in the cove that involves only art that I have made, so I've been testing with the vanilla files.
The issue is that I have not been able to load custom hallway backgrounds while in corridors.
I am able to select the texture I want for rooms, but setting up the same arrangement in the corridors yields no results.

Example from .csv file:
room;texture=room_wall.coral = room with coral texture in bg
c; texture= corridor_wall.05 = should be corridor bg with 5th texture in folder, but it isn’t.

i.e. I want to make a plot quest in a dungeon that is completely custom graphic exclusive. Is there a way to do that?

[rosabellagm]

Amazing article thanks for sharing.