They’re using variable rate shading. It’s a hardware feature on the 20 series gpus. Any game that works with Pimax’s fixed foveated rendering is extremely likely to support eye tracked foveated rendering. It’s as simple as changing the areas of low and high res to match the location the eyes are looking at. It may be that some games can use variable rate shading, but aren’t utilizing it. That would explain why some games work and others don’t. Who knows?
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