by the moment, i've added a soft-fx that 'reflects' the background to make a water-reflection effect. do you think it works?
This way waters and mountains seem to lie on the same plane (which would make reflections impossible), whereas they lie on perpendicular planes. To fix this, during the rendering of waters, just skip a line every other so that the waters occupy 1/3rd of the screen and the mountains 2/3rds - by the way, this also fixes the unusual effect that waters - a horizontal surface - occupy more space than the frontal background.
The progressively disappering sinusoidal waves effect looks fine

- edit: on second thought: now that I look closer at the picture, it does not seem that progressive, but rather a 2-step process... is it so? mmm... it looks weird... I'd go for a continuously decreasing amplitude.
saimo