water, you need to make some sort of hole or pit where you need
the water to go first.
all you need to do is find a texture for the water, go to "textures"
Then find "liquids". Load up your texture
window if its not already on press t.
create a brush where you want the water to go and thats the
water all done. I chose "water_calm2" for mine:
all done now, this particular water looks like this in game,
if you need to join pieces of water you might get a line error
or something, to combat this you can use a nodraw water texture
and shader, just make a simple texture or copy one and rename
it nodrawwater and use this shader:
(Thanks to det for that)