Tutorials
Realistic Water
The Textures
First, we take care of the textures we will need. The texture "water" is a normal .jpg (RGB-mode saved in 'Baseline-Standard').
mymap/water.jpg (scaled 50%)
"env_water" is our environment texture and also a .jpg (RGB-mode saved in 'Baseline-Standard').
To get it we have have to build a testmap. That testmap should consist of the skybox (with lighting), a skyportal (if needed) including
your basic/background terrain and an info_playerstart. After compile you start the map (devmap [mapname])
and type following two commands into the console:
cg_drawgun 0
After that you change into first-person view and take 2 screenshots of the map. Just go in the middle of your map and take a shot after every 90° while turning around.
Hint: if possible, avoid very bright spots on those screenshots. shot1 (scaled 25%) |
 shot2 (scaled 25%) |
Now merge both pics together by using a graphics program such as Photoshop. Then scale it till it has a texture format (1024x1024 pixel should be more than enough). Now use the Motion Blur Filter to make it unsharp. Last but not least bright it up around 75% and save it as .jpg (RGB-mode saved in 'Baseline-Standard').
mymap/env_water.jpg (scaled 25%)
The Shader
| textures/mymap/water | // name of the texture (in Radiant) |
| { | |
| qer_editorimage textures/mymap/water | // picture of the shader in Radiant |
| sort banner | // depth sorting of shaders |
| qer_trans 0.8 | // transparency in Radiant |
| surfaceparm nonsolid | // surface is non solid |
| surfaceparm nonopaque | // surface is transparent |
| surfaceparm trans | // surface is transparent 2 |
| surfaceparm water | // water characteristics |
| q3map_material Water | // water characteristics 2 |
| tessSize 128 | // divides Brushes into 128x128 Brushes |
| deformvertexes normal 0.1 1.85 | // undulation |
| deformvertexes wave 128 sin 0 1 0.3 2 | // undulation 2 |
| { | |
| map textures/mymap/water | // basic texture |
| blendFunc GL_ONE GL_SRC_ALPHA | // transparency |
| rgbGen const ( 0.5 0.5 0.5 ) | // weakens colors 50% |
| alphaFunc GE128 | // filters black |
| alphaGen const 1.0 | // alpha-channel attitudes |
| tcmod scroll 0 -0.25 | // texture scrolling (optional) |
| } | |
| { | |
| map textures/mymap/env_water | // environment texture (reflectivity) |
| tcGen environment | // makes this an environment stage |
| rgbGen const ( 0.5 0.4 0.4 ) | // (red stronger than green & blue) |
| blendFunc GL_ONE GL_ONE | // transparency |
| } | |
| { | |
| map textures/mymap/env_water | // environment texture (reflectivity) |
| tcGen environment | // makes this an environment stage |
| blendFunc GL_DST_COLOR GL_ZERO | // transparency |
| } | |
| { | |
| map $lightmap | // lightmap stage |
| blendFunc GL_DST_COLOR GL_ZERO | // transparency |
| } | |
| } |
Pack shader and texturen into a .pk3 and move it into your base folder.
Important: don't forget the shaderlist.txt (...base/shaders) entry!Ingame
To use the new water, create a brush and give it the "system/caulk_water" texture. Now select the visible sites of the brush (ctrl+shift+alt+left mous button in 3d window) and give those the new "mymap/water" texture.
Now it's time to compile.
Have Fun!
