When rolling left and right in DCS, The landscape and buildings get blurring in my Oculas rift too sometimes. Still waiting on 5K+ preorder. To stop it on my Oculas, I have to restore nvidia default parameters in the nvidia control panel then change VR rendering to back to 3 in the control panel and it stops. It only blurrs the oculas when banking whenever I try to use Steam VR first to start DCS instead the Oculas home screen. It may not be a Pimax issue but steam or nvidia issue. BTW I have a Asus 2080 Ti Strix OC video card and 9900K CPU.
I never used SteamVr to start DCS and only Oculas Home screen or the third party DCS Updater Utility from Skate Zila and this problem only started when trying to start DCS from SteamVR. I hope I don’t need Steam VR to start DCS when using a primax 5K+ and hope I can start the sim through pitools instead.