Weird patterns on the walls

[Everynone]

Consider attaching a screenshot - otherwise it’s pretty much impossible to figure out what might be wrong.

edit: This, right?

weird patterns on the walls

hello, i have weird patterns on the walls of this house, i tried many things i found on the internet but nothing fixed it, i added a cube inside the house and it worked perfectly, i moved a wall inside the house and it also worked perfectly, but when i move the walls where i want them to be then weird patterns appear [Screenshot_5] [Screenshot_1] [Screenshot_2] [Screenshot_3] [Screenshot_4] [Screenshot_6]