So we have a few ways to spit games to our HMDs (SteamVR, vorpX), and they are pretty demanding. But there is a third way that can be less demanding, but is tricky to setup; using SuperDepth3D/SuperDepthVR to add depth-buffer stereoscopic rendering to non-VR games.
In thinking about ReShade and VR (not yet compatible), I thought; “What if Pimax came with a tool that allowed us to play older games on our HMDs as VR titles?” That might be a heck of a selling-point. You wouldn’t need to support motion-controllers, just head-tracking, since none of those older games had motion-controller support; with the basic concept being an injector (either part of PiTool, or a separate tool) that you could use to launch legacy games, at which point they would hook ReShade & SuperDepth3D/SuperDepthVR directly and send that all to the Pimax HMD, completely bypassing SteamVR. It’s not a perfect solution as SuperDepth3D is z-buffer, not geometry, so you get some artifacts, but it’s really good overall about this. On the plus side, SuperDepth3D/VR has incredibly low overhead. We are talking only a tiny performance hit (like 2 or 3 fps), so performance would be excellent.