Fix Runtime Virtual Texturing pop-in

[Nyanyanyanyanyan]

Every time I load a save, teleport somewhere, or turn the camera towards a direction for the first time I can see textures of structures like walls or stairs gradually changing (several times) from lower to higher quality; attached below is an example comparison between first second after loading in and 5 seconds or so later.

After extensive testing I've found that RVT (Runtime Virtual Texturing) is the source of the pop-in, because it's completely gone when setting r.VirtualTextures=0, but of course the game looks bad like that.

Settings I've already tried that didn't fix the issue:

r.VT.MaxUploadsPerFrame=64 or 128
r.VT.MaxContinuousUpdatesPerFrame=64 or 128
r.VT.MaxTilesProducedPerFrame=64 or 128
r.VT.NumTranscodeRequests=32 or 64
r.VT.NumFeedbackTasks=4
r.VT.ParallelFeedbackTasks=1
r.VT.PoolSizeScale=1.0 up to 4.0
r.VT.FeedbackFactor=4
r.VT.RVT.StreamingMips=3
r.VT.RVT.TileCountBias=2
r.VT.RVT.DirtyPagesKeptMappedFrames=60
r.VT.RVT.DirectCompress=0
r.VT.RefreshEntirePageTable=1

Could there be a way to improve RVT (make it faster?) in order to eliminate or at least reduce loading pop-in?