Typically the battle background changes if you engage in a fight in a field, a ship, a dungeon, etc.   Is there a way to have the battle system call up a different background depending on certain criteria being met?  What would you suggest be the trigger for a different background being pulled up?

Looking to create rpg battle background like earth bound : r/gamemaker (reddit.com)

For now this is the closest I could find in terms of resources. I'll keep looking, though.

This may be closer to what you might be looking for.

Changing Palette of Sprites/Backgrounds Dynamically? : r/gamemaker (reddit.com)

Retro Palette Swapper by Pixelated Pope | GameMaker: Marketplace

Can I use a sprite when drawing a global variable? : r/gamemaker (reddit.com)