I have a question and I need some help

I’ve imported a photo to use as a texture in one of my models. I need to make each face unique, but when I do this, the texture changes colors and gets all messed up. Why is this happening? And how can I work around it?

Could you share the SKP file so we can see what you’re attempting to do?

house.skp (2.3 MB)

When I select one of the faces and choose to make it a unique texture, it gets all messed up, The file is attached to this.