1 modder, 2 days, and AMS2 VR gets QVFR resulting in 30% gain in GPU usage

There is a new community mod called ams2-qvfr (https://github.com/hypeapps/ams2-qvfr) which makes AMS2 far lighter on your graphics card.

If you've used foveated rendering with VRS in OpenXR Toolkit, you know the idea: spend GPU effort where you're looking. VRS does it by shading the periphery coarsely, but the frame is still rendered at full resolution, so the saving is limited. This mod goes further. It renders the periphery as a genuinely small image (a quarter of the resolution per axis in my test) and renders the area you're looking at as a separate high-detail image, then blends the two. The GPU simply draws far fewer pixels: about 13 million per frame instead of 43 million (pimax dream air)

Eye tracking makes it better, but it works without it too: you just have to make the sharp area bigger, and you give up some of the saving.

My test at Brands Hatch (RTX 5090, Pimax Dream Air, 72 Hz, same lap):
- Same 72 fps
- GPU load: 83% down to 56%
- GPU power: 478 W down to 325 W
- VRAM: 12 GB down to 9 GB

You pay with some CPU (about 3.4 ms per frame in my test). If your CPU has room, spend the GPU saving on more detail, higher MSAA, or just a cooler PC.

You can also forget about cropping your field of view to save GPU perf. The edges are already cheap because they are rendered at low density, so cutting them saves almost nothing, and it costs you immersion. Keep the full view.

This is the kind of thing VR players have wanted from the game for years. One person did it in a couple of days, from the outside, without the source code. Imagine what the studio could do with the engine in hand. Reiza, please take a look.

It's an early version and it modifies the game folder, so back up first and use it at your own risk. I haven't tested it online.

Amazing work by the mod author. Has anyone else tried it? I'd like to see numbers from other headsets and cards.

There is also Dan Suzuki's QV mod for LMU which shows similar GPU gains but at a smaller cpu cost.

https://github.com/DSuzuki35/LMU-Quad-View-Mod/releases/tag/v0.3.0

And also Williem3's sim-qvfr mod for AC evo and ACC.

https://github.com/Williem3/Sim-QVFR

 

Hi, yes I've been using it today.

Amazing mod.

Pimax crystal super ultrawide / 5090. I was using sboys3 driver with ofxr bridge for 2x frame generation. 90hz and a pretty high resolution in steamvr.

This mod just slotted straight into that stack.

Now with this foveated rending mod I have increased the resolution and increased in game settings. And still getting stable fps in rain and full grid starts. My new steamvr resolution might be 5770x4880 (ballpark).

A few artifacts here and there caused by the frame gen but not fazed. I might test without sboys3 and ofxr at some point.

But yeah, phenomenal mod. I actually signed up to this forum to share my experience with it.

 

I absolutely love this.
The biggest performance jump I have ever had from any tweak / tool.

 

Been testing it out too, latest version is really getting this game to incredible heights...

In the most recent release He's managed to fix the only quad views artefact which were the crepuscular rays and sun flare making the box visible, now totally gone, he's reduced the CPU overhead even more, and now has even added DLAA to over ride the game's TAA.

It's incredible what has been achieved in such a short period of time and does really make you wonder.... this was all achieved in a couple of days by someone with persistence, a love of the game and an AI subscription.

I'm currently able to run this on a Dream Air with DLAA and *ALL SETTINGS AT MAX* and holding frame times in the region of 6-8ms at over 200% resolution on the Sboy steam driver (5736x4848 per eye before quad views!). The image quality is out of this world, only remaining thing for me is the trees don't quite behave with this version using TAA or DLAA... hopefully it can be fixed as that's literally the only thing stopping this from looking pretty perfect at the moment.