Oh wow, kind of glad that I'm not the only one experiencing this god ray issue. At first, I kept taking the Rift off and cleaning my glasses and the lenses with microfiber because I thought I kept steaming the lenses up, but after it happened almost all the time, I realized it has to be the headset itself.
I did notice it's the worst in dark scenes with a single light source. When Mage's Tale loads and that magic symbol appears in the middle of the screen, that thing shoots god rays like crazy. I havent tried Elite yet but I can imagine with a game that dark, it might be a problem.
As someone suggested, coming from PSVR where that's basically non-existent, I think that's why I'm noticing it so much on the RIFT. However, I still very much love the headset, and my god some of the games on here are absolutely killer.