Any easy way to mod?

hello UE4 people.
i was wondering if there was an easy way to add a mod to a game…

like for example… in a topdown 2d game… (

i want my floor/level to be moddable…
or something like

a user has an image in a folder…
black and white… think rooms and hallways for white… and black for un-passable…

if a button is pressed that commands the game to look at a folder and select the file and converts the white stuff to a plain floor…
and the black are just un-passable black…and adds it to an empty level in game that is useable by the player…

any way to do that?..

see attached image*

You can achive it with a bit of programming, but I’m pretty sure it is not possible with Blueprints, but I could be wrong.