I have been fighting with this problem for some time now; the water shader. I'm following the instructions of Rich Diesals tutorial to the word: I make a brush that is entirely caulk, then i texture both the top and the bottom with the bespin/water1 shader. When i play, it shows up as a grate with really big holes, but it has all the qualities of water, it's not solid, it splashes when i walk in it, it doesn't let me out of my fountain i made when i didn't realize you can't jump effectively in water...
Now, i hope i can get you to understand the picture... ...this is how i've done it as a cut-trough, if it is wrong then tell me, please.
| |<-bespin/wall2'''''''bespin/wall2->| |
| |'''''''''''''''''''''''''''''''''''''''''''| |
| |'''''''''''''''''''''''''''''''''''''''''''| |
| | ----------------------------------------| |
| | ^top of waterb. , bespin/water1^ | |
| |'''<-caulk/waterbrush->'''| |
| |'''''''''''''''''''''''''''''''''''''''''''| |
| |____________________________| |
| ^waterb. bottom bespin/water1^ |
|<wall2___________________wall2>|
^wall2^
I hope you get this... it's the simplest way of explaining how i did it... i looked in a few tutorials, planetquake.com/bubba was wrong, i hear, this is how Diesal explained it...