I have a building with about 10 floors. Each floor is its own png picture in the model (the pictures are located one on top of another) . The pictures are all the same size - they are quite big with lot of empty space around the buildings (as there are several buildings in the model). The empty area is transparent and the buildings have some colour. The problem is that sometimes the corner of the picture is drawn in a strange way. So when the model is rotated, the corner is can be seen (there is nothing really in the corner)
Can this be fixed somehow easily?