In the new version of CC (update 9) we are constantly getting a strange phenomenon of lines which radiate from a certain point in the models, see pics below. This happens when we make the model bounds from a polygon in a dgn file (new feature of update 9). These lines do not appear when retouching the tiles. How can we avoid these lines, or erase them in retouching?
I've also had this problem in similar situations, though not to the same extent. Always when using an irregular polygon to define the bounds, and the spiderwebs radiate from a vertex of the polygon inwards.