I am working on a bedroom project in Blender while following a tutorial. I'm not sure what I did wrong, but while attempting to color the walls of my bedroom, I realized some of the parts were- folding in on themselves?
I'm not sure how this happened, I recently merged the vertices by distance to fix a different issue; would that have anything to do with it?
Here is the blend file: https://blend-exchange.com/b/OsmXJW7G
I feel a bit silly asking another question only minutes after my last got resolved. I'm just not sure what else to do.
Help and advice very appreciated!


