Reece,
it has nothing to do with my tweaks, it seems to be general issue with SH4>SH3...
This is your screen from the top of thread,... if You follow yellow arrows, it should ring a bell:
Reflections "under" boat look great

but those "pointed" at far side should not be there,... or at least should be 1/3 of present intensity level.
Resolving a direction of reflections with SH4 scene.dat would be a real step forward...
Anybody...??