have built a new bathroom but unfortunately, one corner is uneven, uncomfortable, cannot remove the timber in the corner, the corner is about 50 x 50 cm, otherwise the ceiling is evenly nice, at least 3 meters long and then 2 meters wide, is it possible to put panel despite the uneven measurements, think ??
To install paneling, it is usually standard practice to set some form of sparse boards underneath that extend a bit from the existing ceiling. Interpreting the rest of the image, the ceiling should probably be lowered a bit, and then it's just a matter of adjusting the beams you set in the ceiling, cutting away a bit in the beams where the ceiling is slightly lower.