Tutorial created by Darklord. Mirrored here for archival purposes. Note not all the images were preserved however the thumbnails were.
Q: How do you add a layer of water that can be walked through?
A: Create a brush, pick a water texure that you like (they are all in the general texture group;), and apply it to the brush.
Then, using the surface inspector, apply the "normal 2-sided" surface flags to it (look for a button on the right hand side of the surface inspector).
If you're in the mood to be detailed (and heck, who isn't?), keep in mind that the water texture on the *bottom* of the brush is going to draw on the bottom of whatever pool you are creating (unless you mark it as nodraw, but I like the way it looks with it drawing on the bottom). If this bottom brush plane is actually touching the floor of the pool, you're going to get some strange diagonal lines as the engine attempts to draw the water texture and your floor texture at the same location. You can fix this by lifting your water texture a single map unit away from the floor, so that it's not actually touching the ground.
Water Screen Shots
I got tired of trying to guess my way through which water to use for what map, so I created a set of screen shots for reference. Enjoy.
Several of these textures turned out completely black, including some that I remember not being that way in the single player game. If anyone knows what I'm doing wrong, feel free to drop me a line.
FYI, the watertest texture will crash the game on level load if you use it.
