I am having issues when using the shaded with edges views. Whathappens is that there are extra lines showing up on surfaces thatshould not be there. This usually happens when the object in frontis relatively thin in comparison to the overall part/assembly. Inthis assembly there is an angle frame structure built on the insidewith a piece of 1/8 th in thick material mated to thefront plane of the structure. The parts are all coincident and arenot colliding into each other. When I zoom in the lines willgo away but when the view is zoomed out to see an over all that iswhen the issues shows up. Any ideas what might be causing this?