persistent parallax graphic change?

Hello, newbie's first post with a question.  I've been following a lot of tutorials and managing to find solutions to various questions/issues as I go, but I've run into an issue that I can't seem to find a solution for.  I'm studying parallax mapping and I have a good idea of how it works, how to use it, etc.  I can see on the event page where I can change the graphic.  Currently, once the player leaves and reenters a map, the graphic reverts to the one in the map's properties.  My question, is there a way to make the change permanent, even if the player leaves/returns to the map?

Put the command into a parallel process event, and after it, put an Erase Event. If you only want it to start at a certain point in time, condition the event (on the left, above the event sprite, not on the right as a Conditional Branch command) with a switch, then turn on that switch at the time you want the parallax to be used.


Why are you using an event instead of just setting it as the map's parallax background?

I have two backgrounds I'm using as a map (I'm using Yanfly's locking script).  The first map shows a house in disrepair, the second shows the house fixed up.  The reason I'm using the background is it was easier to customise that trying to find or make a custom tileset for me.  I set the first as the initial background in the map's properties, but wanted to permanently change it once an event triggered it.

Thank you for the advice, I'll go see if I can try it out now.

Update: changing the transfer on the previous map and separating the fadeout/fadein along with your instruction works perfectly.  Thanks again!