What should I do to prevent or clean up fragments of hidden lines in Ai export? I find that curves on the surface of a solid are not hidden if they are too close to the visible surface of the solid. Here's an example of Ai export where I have colored fragments red:



And here's what it looks like in the MoI viewport:



I tried increasing "Canvas megapixel resolution" from 30 to 200 as suggested in http://moi3d.com/forum/lmessages.php?webtag=MOI&msg=8720.1 but didn't see any effect.