I have had this issue for month that glass materials (BlinnPhong and PBR) keep flickering to opaque white in certain angles without any discernible systematic reason. I tried to adjust environment lighting, reflection probes, point lights etc. I tried SL viewer & Firestorm and both have the same problem. I provided a video to show the issue (recorded in Firestorm). This game is unplayable due to this issue and it used to work fine like half a year ago at the very least. The problem persists if I change my graphic settings to anything from Low to High (record shows low settings)