[SM] Water at certain point

[Cpt.Glitch]

I am trying to get a halfway submerged room in the wrecked ship. I messed with the surface start for a good thirty minutes now and the room is always completely submerged. It's quite frustrating. How exactly do  I know what value to put in to get it where I want? 

[Quietus]

Usually with water in rooms, it's easier to just hold Ctrl, and click where you want the surface to be.

[Jordan5]

or if you're using JX, there is an orange bar on the far left hand side of the screen which is the FX1 height, so just drag that to where you want it :^_^:

[Cpt.Glitch]

Thanks guys. It's always something simple.