your issue looks just strange ( may be therefore also not many answers ) and it is not the same as the topics issue ( topic is only these areas with these “square-edges” ).
In you case the water is not correct rendered at all and this looks possible more like these topic:
in which, so far I understand, also a faulty 2070 was the possible reason ( must not same case in your case, but… )
I would suggest to reset all nvidia settings, install the newest gpu driver , of course try without any installed mods, etc … otherwise I have no special idea.