slow visuals - imported Zemax rayfile
I have imported a large ray-file from Zemax (lots of datum curves, the part with the rays is 42MB) and now Creo (2.0 M180) is locking up after i move,rotate or pan the part.
The movement is OK, but when I stop moving, then Creo is unresponsive.
The grafic card (M3000M) is not stressed (load stays below 8%), but I do see that CPU load increases 5->13%.
This only happens in an activated window, a non-active window doesn't have this problem.
Is there an option to make this faster?

