[url]https://developer.valvesoftware.com/wiki/Your_First_Map[/url]
You should read that and come back if you still have any doubts.
For water use a water texture.
We don't know.
Make a nodraw brush and give the top face a water texture. Go nuts.
Two molecules of hydrogen and one of oxygen.
Hope this helps :v:
Nobody knows this. Go somewhere else [U]far away from here.[/U]
Make a block out of some brick texture, texture the top of with with a water texture, and tie the whole thing to a func_water_analog :v:
To create water you must first create the universe.
[QUOTE=FalseLogic;46680100]Make a block out of some brick texture, texture the top of with with a water texture, and tie the whole thing to a func_water_analog :v:[/QUOTE]
Don't forget to run a func_viscluster through it or it won't reflect properly.