i have a problem with displaying lines on the scene for example, i have two trident objects. http://s7.postimage.org/5lfj1hoej/image.png
but when i add some objects on the scene, this trident lines begin to behave strangely. http://s7.postimage.org/6qj8hq6kr/image.png i tried to change view renderer and clipping but it doesn't help me. how can i fix it? thanks!