I have also encountered this. 

Then there is the occasional bug where suddenly 3D layout looks like I just turned on the hyperdrive.

I’m also finding the 3D layout freezes, most often when I’m updating a parameter in another window, haven’t yet noted exactly what does it most regularly. It started in my last update of Zemax OpticStudio and is still in the newest Ansys R2 I’ve just switched to.

My best workaround is to clone the window. This keeps my settings and gives me back the working 3D layout.

It has definitely happened to me a couple of times since I updated to R2.00. Everytime I ended up cloning the window as @James.Parker is saying. I couldn’t identify a pattern that was causing the issue though.

Thanks to everyone who mentioned this. We do have bug reports on issues like these (freezing, strange graphics) so this is a known phenomenon. As with all bug reports, there’s just no way to know how long a fix may take, particularly when the problem is hard to reproduce and when workarounds exist, like opening a new window, toggling views, etc. I haven’t heard about cloning as a solution, but I’ll give it a try next time my own graphic window goes a little bonkers.

Still happens to me, 2024 R2.01.  It would be nice if this could get fixed soon...

@Ray Jones 

I understand the frustration. If you want to help get the bug fixed, I suggest you describe how it happened to you. Also are you able to reproduce it systematically? What were you doing right bedore it happened? As
@Kevin Scales is saying, if the developers can't easily reproduce the bug it's extremely difficult to find the root cause.

Take care,

David

@Sean Turner, Have you considered selling your art?