How to make water:
  1. Before you get started, open up common.shader (in base/shaders/) and add this code to the end of it:textures/common/caulk_water 
 { 
 surfaceparm water 
 surfaceparm nodraw 
 surfaceparm nonsolid 
 surfaceparm trans 
 }Now download this (
http://www.deevickery.btinternet.co.uk/ww/forum_stuff/q3map2/images/caulk_water.jpg) image and save it as "caulk_water.jpg" in the textures/common/ directory. 
 2. Now you can fire up Radiant. 
 3. Create a brush that is the size and shape of the water you want. 
 4. Using shift+click, select the entire brush. 
 5. Load the "common" texture set by choosing "common" from the textures menu. 
 6. With the brush still selected, apply the caulk_water shader to the entire brush. 
 7. Hit escape to deselect everything. 
 8. Using ctrl+shift+click, select the top surface of the brush. Only select the surface, not the entire brush. 
 9. Texture this surface with the bespin/water2 shader. 
 10. Using ctrl+shift+click, select the bottom surface of the brush. Only select the surface, not the entire brush. 
 11. Texture this surface with the bespin/water2 shader. 
 12. Compile, and that's all there is to it.