CS issues with Skyrim Upscaler VR

[ryannotfound]

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After some pretty thorough VR testing with CS and Skyrim Upscaler VR, I've determined the following with my setup.

1. Latest version of Skyrim Upscaler VR (1.2.1) is NOT compatible with latest versions of Community Shaders (1.2.1 or 1.2.0). When using the two together, both eyes appear to have an underwater ("swimming") effect where all meshes and textures will warp and skew to some degree, making the game unplayable. This is EXTREMELY disorienting in VR, and things have a grainy/blurry look to them while textures move/shimmer.
2. Latest version of Skyrim Upscaler VR (1.2.1) DOES work with Community Shaders v1.1.15, however, in my experience, only the DLSS Ultra Quality and Native (DLAA only) options work without any perceivable issues. Using any other setting below Ultra Quality (Quality, Balanced, Performance, Ultra Performance) will still produce issues, mainly in the right eye, where it appears only distant objects (such as clouds) suffer the underwater ("swimming") effect. Closing my left eye and staring at a small cloud cluster made it easy to see it shifting wildly. Additionally, nearby objects will have sort of a shadow outline effect appear when moving your head (at the top of a spiked fence, for example). This is also only in my right eye. Finally, one issue that persists through all settings are comfort options. When using Skyrim Upscaler VR, the comfort "blinders" are no longer opaque, so are effectively disabled if you use them.
3. Changing the DLSS setting via the in-game Skyrim Upscaler VR panel will not fully take effect until the game is restarted. For example, changing from Native to Quality may not appear to have the "swimming" issue, but upon exit and relaunch of the game, this will start occurring.
4. In my testing the Nvidia driver version used for Skyrim Upscaler VR did not matter. I have stuck with 310.2 but did additionally test 3.8.10, 3.7.20, 3.6.0, and 3.5.10.
5. Skyrim Upscaler VR (1.2.1) works 100% fine on its own for my purposes, but I do not have a frame generation capable RTX card. This means that there is no underwater ("swimming") effect present at all without Community Shaders also enabled.
6. Using Skyrim Upscaler VR (1.2.1) with latest versions of CS (1.2.1 or 1.2.0) and attempting to disable shaders from the in-game CS menu didn't do anything, so it does not appear to be a config related issue. Many settings are disabled in CS due to usage of Skyrim Upscaler VR, so it is likely integration.
7. I have not performed any testing on Skyrim Upscaler VR with ENB and do not intend to use it, so will not provide any results from that.

Based on the above, I am not sure if this is a Skyrim Upscaler VR issue or a CS issue. The major downsides of this are that by using CS 1.1.15, I don't believe newer additions (on or after 10 Mar 2025) are usable.

My setup: Quest 3 HMD Virtual Desktop + SteamVR on Windows 11 Intel 12700KF + RTX 3090 GPU Game Ready Driver: 566.36 (Thu Dec 5, 2024)

• EDIT - added game ready driver version