Game starts running poorly for me when when camera is pointed towards blue portal side of the final arena. Gpu/cpu usage drops to 10-20%, and fps drops to what feels like 20 to 30 fps when lots of things are going on.
Looking towards the other side, gpu/cpu usage goes to normal, and fps stays somewhere between 100 and 200.
Is the issue something on my end? It doesn't happen anywhere else in the game that I've noticed. There was a similar bug when looking at doors and such that got fixed with SET MinFrameTime.2 "0.00000000" for me, but that doesn't help in Vateshran final arena.
The issue persists after the fight, here are screenshots of the affected and unaffected side, framerate is in bottom left corner. (view distance is controlled by Votan's adaptive settings)
67fps
182fps
CPU: AMD Ryzen 3600
GPU: Nvidia RTX 3070 (driver 461.09)