Hi,
If you have a repro scene, I'd appreciate it. I will PM you a link to upload the files to me.
Cheers,
Rowan
I tried to recreate this in a new scene with exactly the same setup of proxies etc, but IR works fine here. It's only in the other max file the issues persist, so I will just continue work in the new file. Very odd.
*UPDATE* So just working for half an hour or so on the scene suddenly the IR performance went laggy again. But only with the simple FP object visible. I haven't added or changed anything, just moved camera around to find views. If I keep orbiting around with the camera (or just in perspective view) with FP visible, it freezes exactly every 3 seconds for exactly 3 seconds, then continues to orbit/move whatever I do for 3 seconds, freezes for 3 seconds. Repeat.
**UPDATE 2**
Disabling the "Limit to visibility" under Camera in the FP object fixed the IR issue - isn't this an old issue now I come to think of it?