Many thanks for reading my post. My house have a lower plaster ceiling (about 2900mm from the floor) at the kitchen area and ceiling at the rest of the house is higher (3100mm from the floor). When i built my wall in sweethome3d utility, i spec the kitchen wall at 2900mm height and the rest of the house wall at 3100mm height. When i turn on the ceiling i notice the ceiling become uneven in the area where the wall are of different height. How do i solve this problem?