Hi Niki,
it happened on all 2023 Ansys Zemax versions. I recently installed the 2024 R1 release and it happens there as well. It happens on various designs I made, so it seems not to be linked to a particular design file. My computer runs Win10/64.
One theory I have is that the 3D layout is operated by the graphics card and my graphics card could be at fault. So I would be interested to learn if anyone else has this problem, or is it just me. If the latter, it points to a hardware problem on my machine.
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