As I said in the "Submergible Water with Sloped Underwater Surface" tutorial, I am through with attempting to create water involving sloped underwater surfaces. As hard as I tried, I could not get this damned effect to work properly. I have provided a tutorial map SLOPEWTR.MAP which was created by Gijs de Vries (I slightly modified it by adding the letters "B2"). The effect seemed simple enough to create, but looks can be deceiving. Perhaps in a future update I will explain how to create this effect. I can help you out a bit though. The effect uses a stretching/shrinking sector to pull back the sloped land mass, and at the same time raises the floor of the water sector. You might have to play around with the speed of the floor rising to get it to work properly and look good, and remember, the speeds of the two water sectors must be equal. The biggest reason I didn't explain this effect is because my stretching/shrinking sector would shrink, but would never stretch back to it's original position (glitch?).