On the subject, sortof... after seeing this picture:
...earlier in this thread, and after reading the comments, I decided to take it upon myself to try this bit (the wave textures) seeing as - like RB says - it's the easy bit
I don't have SH4 so I don't know what that foam looks like in motion, but even if I did I doubt I could replicate it exactly in SH3 (someone else might be able to though). Nevertheless, I've managed to get some wave and foam textures into SH3 which are (for my taste) a huge improvement over the stock ones.
RB, I hope you don't mind me putting this stuff here in your thread - just seems the best place cos the discussion started here
I captured
in a hurry (cos I need sleep now lol) which should give people an idea of how the new textures look. Unfortunately it seems that youtube limits the video resoulion

so the new textures look a bit blocky in the video but in the game they're nice and crisp.