take a lokk at my model of a building. I have arrowed out a few lines that I do not know why they exist.
The long one in the center is just the point where I duplicated one half to create the other half...the top lines are jus an extrusion from the faces that are imdediatley below them that when looked at have a more smooth roundness to them...
can anyone help me with making things better with the info I have given you?
HERE IS MY IMAGE: