{watermode} - set to 1 to enable water effect, eventually there will be more modes usable with higher numbers but for now there's just one
{amplitude} - the amplitude of the sine wave used in the water effect
{wavelength} - how many pixels long one repetition of the sine wave is
{wavespeed} - how fast the sine wave moves
{bgspeedratio} - multiplies how much [b]bgspeed[/b] affects the bglayer
Updated the screen code to support these new additions.
Added "bgspeed" to changelevelproperty. Modified bg scrolling code to remember position so that bgspeed can be changed midlevel without bglayers jumping. Started on changebglayerproperty script command, will finish later.
