I never really solved the SSW artifacts but ended up switching things around with SteamVR at 3120x3120 per eye and toolkit running at 4700x4700 override with Pico 4 at 72 Hz and Virtual Desktop at HEVC and 150mbps, no SSW. Net is a smooth image 80% of the time. Still not happy with my setup sadly. Pico 4 is great. SteamVR is a resource hog and spikes crushes the cores and hurt the game performance to the point you get stutters. Bizarrely enough, even running my set-up in game on low end doesn’t seem to impact how Well SteamVR destroys the experience. I miss WMR… never thought I’d say that, but WMR and openXR is so much more efficient!