Bug: Iray Decals Breaking NVIDIA Iray Preview
lilweep
Posts: 2,487
If you have Iray decals parented to Scene items, and then hide those items, then NVIDIA Iray preview doesnt work anymore, regardless of draw style (Photoreal, Biased Interactive, etc).
Basically iray preview will not load unless you are rotating your mouse.
This has been a problem for several years and is consistently reproducible once you have a few Iray decals in scene, by the way.