I like to drop a post every now and then on another virtual universe I'm involved in developing, with a working name of Starlite Galaxies. It's a user-content generated world like SL and Opensim, but not based on their code. A complete new game engine has been written from the ground up in proprietary codebase using C++, utilizing the Vulkan API instead of OpenGL. The universe will not be compatible with opensim code, but we are discussing a bridge option down the road to allow opensim users to visit. The game is currently approaching alpha testing for which all slots are filled.
The top shot is a helmet readily available on 3D model sites that we use to test our handling of PBR materials and shaders. This one is reflecting the environment we dropped it in and running at 4910 fps on full blast graphics using a GeForce 3060 card (I believe this is the same helmet visible in the recent SL tutorial on their version of PBR)
The bottom image is an asteroid field with 50,000 physical objects all orbiting a central mass independently of one another. We wanted to find a breaking point, but only got the fps down to 720 fps.
We also are testing on a variety of lower end machines to find baselines for the graphics and physics. But if you want to go full-bore gaming using VR, controllers, joysticks, flight-sim equipment, etc., then all of that capability is already there and working. Probably would only want to use VR with your feet on the ground. We found flying ships in VR was...unsettling.
See my Facebook page for larger images:
https://www.facebook.com/LunariaEmporium