OpenVR update 1.10.20 -> 1.16.8, resolve deprecated crap Add internal managed code bindings for OpenVR interfaces to Sandbox.Engine VROverlay class in managed with rendering props and render update loop Basic VROverlay in Sandbox.Menu with a render target texture of the menu UI - probably a shit place for it but can be moved easily. https://files.facepunch.com/matt/1b1811b1/vrmonitor_A6tO3ufJP9.png Iterate on VROverlay API, make the coordinate system match engine, poll events and simulate input in the menu.