I was never having issues with vulkan until 4.5 patch. But this patch game was crashing before a single frame was rendered with EXCEPTION_ACCESS_VIOLATION(0xC0000005) error. These were the steps I took to fix it. IMPORTANT These fixes were implemented because in my game log files I saw "[OpenXR] Runtime failure: Something went wrong inside the OpenXR runtime." This was causing my crash. Your game log file will be in your LIVE folder, and you can see if this error is causing your issue." Try these if you're an nvidia user and maybe had connected a vr headset to your computer in the past. Registry edit: -win+r, regedit, -Find HKEY_LOCAL_MACHINE\SOFTWARE\Khronos\OpenXR\1 -Delete ActiveRuntime Nvidia CONTROL PANEL (not nvidia app) Note: I had sworn on my life I had these set previously to these settings but for some unknown reasons they were set back to default. I blame CIG (<3). Set -High-performance NVIDIA processor -Power management → Prefer maximum performance -Low latency mode → Off Delete 1) C:\Users\(your PC)\AppData\Local\Star Citizen\ 2) C:\Users\(your PC)\AppData\Local\D3DSCache\ 3) C:\Program Files\Roberts Space Industries\StarCitizen\LIVE\user Nvidia App Driver, update/reinstall, custom installation, clean installation I don't know which part of this multi-step process was the one that fixed it all, but those are the steps I took and now I'm prepping shaders in Vulkan in the game. I hope this helped. I hope it works for you. If it did work, then let us know. If it doesn't then I'm sorry."