Sea rendering is by far the most difficult thing to virtually realise, and matching reality isn't for tomorrow imo

Nevertheless, SH5 sea is the best i've seen on a computer so far.
SH4 sea rendering isn't bad, and funny thing is for some situations SH4 sea is better than SH5, and for some others (80%) SH5 is better...
Maybe a mix between both should close the "sea holy graal"
But for SH5 sea/waves rendering, i'm using:
DynEnv v2.9 - 1. Main Mod
DynEnv v2.9 - 3.b Enhanced Visibility (high)
DynEnv v2.9 - No Underwater Impurity Patch
DynEnv v2.9 - 5.c Ambient Settings - Darker Nights-No Murky Waters
DynEnv v2.9 - 8.b Wave Mechanics - Gale
DynEnv v2.9 - 12. Sounds
Stoianm Pitch and Roll (normal)
...with very satisfying results