Rockstar north has 650 employees and at least two decades worth of experience and time building that engine and everything in it. While I can safely say that the look of the water is very much achievable with some hard work, the full sim and interaction on that scale is something else entirely. But it can be done with a dedicated team I just don’t expect things on that level of flexibility to show up in marketplace anytime soon. I think Pirates has the best loooking ocean in any playable game and ironically thats running under UE and that took lots of RnD with microsoft backing the funding. You get the idea.