Hello, there is a project prepared for the building to be used for underground WC (except the front facade). The curtain named P04 was defined as the sub-basement curtain. However, while doing this, this curtain split the top tile, I could not assign a single tile, it is not a situation I have encountered until now, do I have to do this due to the logic of the program or is there a way to fix it? Happy holidays everyone...