Hi Begad,

I tried to make a test case and it worked fine. That doesn’t mean you are not encountering a problem, though, so if you’d like to open a case where you can share the system you are trying to build, we’d be happy to take a look at it and file a bug report if it proves necessary.

I just wanted to also note that this solved a different but similar  problem as well.

I had made non-sequential parametric parts in the Zemax Part Designer that are on the 10s of micron scale. They appeared fine in the part designer display. But when I imported them into the Non-Sequential Component Editor they didn’t render in the Layout windows below a certain size. I added a rescale parameter to the parts and notice that at about 10^-3 mm the shapes would distort and further reduction in size would cause the parts to disappear from the inside out. Unblocking this box eliminated the problem.

Note that for some reason may setting in the exact same location is called “Use ACIS Libraries”. So it must have been renamed in an update.