Hey everyone. I have been fooling around with 3DS Max and feel my skills may just be enough to attempt my first project for the community. I thought why not make a new model of the McKinley shipyard that I hardpointed quite a long time ago. Anyway I need some help, I have a few pictures of what I have done so far but I just started about 10 minutes ago so it?s not much. I am not fully sure the 'right' way to model but I have a process and things usually look how they should after. So I made a couple of different shapes, mostly primitives, then converted to poly, extruded some faces what not, and then finally used Boolean to either subtract or union to make one full mesh. When I then convert the whole thing to editable poly, these 2 lines appear across the back part, as seen in picture 3. There is one on the top face and one on the bottom face. So my question is where did they come from, are they ok, and if not how do I get rid of them/prevent it from happening in the future. Thanks!