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Yes, such a great game---it's a fantastic visualization of special relativity and also fun to play!

I think we're still a ways off from real time GRMHD sims, but CK Chan from UArizona had a working VR simulation (on the Oculus iirc, but now deprecated) that allowed you to explore a pre-existing GRMHD simulation in real time and in 3D. I think he might be working on a new version of this.

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That's awesome. It's extra crucial to have engaging outreach when your research is so far from application. There's so much scope for wowing people with astro and if you can enrich our culture and justify funding at the same time that's a win-win.

(Just for clarity the second R in GRRMHD is for radiation. I know it's typical to just push some photons through the GRMHD results to produce renders, bit since I'm dreaming let's treat the radiation self-consistently.)

Hahaha, I half-expected a plasma physicist to complain that GRRMHD is not self-consistent and we need to include non-ideal fluid effects :D

Touché. While we're at it there are almost certainly some non-negligible QED processes. I guess there wouldn't be jobs for physicists if this stuff was straightforward.

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