Difference between revisions of "Textures:Shaders"
(→What is a shader?) |
Majkifajki (talk | contribs) (I have rewritten whole page to make it friendly for people who have no idea what 'shaders' are. It might sound retarded for medium/advanced mapper, but newbies will understand it clearly.) |
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| − | + | Shader is short text string, that defines the properties of texture. Using texture in Radiant on solid brush which has to be a simple wall doesn't require to write a shader for it. Every other surface with special attribute - it does. Shaders tells Q3 engine what kind of surface it has to deal with. Wall, water, sky, mirror, etc. You can have sky texture, but it wont act as a 'real' sky in game until you write a shader for it. | |
| − | + | Your main shader file should always be named as your map: ut4_mymap.shader. You should keep it in your /scripts folder and also make sure, it's in your shaderlist.txt file, which is also in /scripts folder. You can call shaderlist.txt 'the main list of shaders'. If it is not on the main list, it will not be on the list in the GTK Radiant Level Editor. | |
| − | The | + | You must understand the difference between shader '''file''' and '''shader'''. ut4_yourmap.shader file consists shaders - it might sound complicated, but mappers use term "shader" for every single one texture with special attributes. So when someone speaks about 'shader', he speaks about a particular fragment of your shader file. |
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| + | |||
| + | Let's use exmaple: | ||
| + | |||
| + | <pre> | ||
| + | textures/ut_subway/plant_bush01 | ||
| + | |||
| + | { | ||
| + | qer_editorimage textures/ut_subway/w2k_bush1.tga | ||
| + | surfaceparm trans | ||
| + | surfaceparm nonsolid | ||
| + | //DeformVertexes autosprite2 | ||
| + | cull none | ||
| + | nopicmip | ||
| + | { | ||
| + | map textures/ut_subway/w2k_bush1.tga | ||
| + | blendFunc GL_ONE GL_ZERO | ||
| + | alphaFunc GE128 | ||
| + | depthWrite | ||
| + | rgbGen identity | ||
| + | } | ||
| + | { | ||
| + | map $lightmap | ||
| + | rgbGen identity | ||
| + | blendFunc GL_DST_COLOR GL_ZERO | ||
| + | depthFunc equal | ||
| + | } | ||
| + | } | ||
| + | textures/ut_subway/chain_link | ||
| + | { | ||
| + | qer_editorimage textures/ut_subway/fence.tga | ||
| + | surfaceparm trans | ||
| + | //surfaceparm nonsolid | ||
| + | //DeformVertexes autosprite2 | ||
| + | cull none | ||
| + | nopicmip | ||
| + | { | ||
| + | map textures/ut_subway/fence.tga | ||
| + | blendFunc GL_ONE GL_ZERO | ||
| + | alphaFunc GE128 | ||
| + | depthWrite | ||
| + | rgbGen identity | ||
| + | } | ||
| + | { | ||
| + | map $lightmap | ||
| + | rgbGen identity | ||
| + | blendFunc GL_DST_COLOR GL_ZERO | ||
| + | depthFunc equal | ||
| + | } | ||
| + | } | ||
| + | </pre> | ||
| + | |||
| + | |||
| + | This is fragment of shader file for "ut4_subway" map. I pasted 2 shaders from it - for plant_bush01 and chain_link. Your shader file will also consists several shaders written by you. | ||
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| + | |||
| + | The most basic shader will consist at least one texture and one script for it. By the time You will learn to create complicated ones, to achieve special and unique effects for your map. Complete manual explaing all the parameters, strings and variables is here: [http://www.custommapmakers.org/wiki/shaders/index.html here] | ||
| + | |||
| + | |||
| + | Like famous Rayne said once: 'It's all in the shaders'. | ||
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[[Category:Textures]] | [[Category:Textures]] | ||
Revision as of 11:34, 20 August 2011
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This page is work in progress! |
Shader is short text string, that defines the properties of texture. Using texture in Radiant on solid brush which has to be a simple wall doesn't require to write a shader for it. Every other surface with special attribute - it does. Shaders tells Q3 engine what kind of surface it has to deal with. Wall, water, sky, mirror, etc. You can have sky texture, but it wont act as a 'real' sky in game until you write a shader for it.
Your main shader file should always be named as your map: ut4_mymap.shader. You should keep it in your /scripts folder and also make sure, it's in your shaderlist.txt file, which is also in /scripts folder. You can call shaderlist.txt 'the main list of shaders'. If it is not on the main list, it will not be on the list in the GTK Radiant Level Editor.
You must understand the difference between shader file and shader. ut4_yourmap.shader file consists shaders - it might sound complicated, but mappers use term "shader" for every single one texture with special attributes. So when someone speaks about 'shader', he speaks about a particular fragment of your shader file.
Let's use exmaple:
textures/ut_subway/plant_bush01
{
qer_editorimage textures/ut_subway/w2k_bush1.tga
surfaceparm trans
surfaceparm nonsolid
//DeformVertexes autosprite2
cull none
nopicmip
{
map textures/ut_subway/w2k_bush1.tga
blendFunc GL_ONE GL_ZERO
alphaFunc GE128
depthWrite
rgbGen identity
}
{
map $lightmap
rgbGen identity
blendFunc GL_DST_COLOR GL_ZERO
depthFunc equal
}
}
textures/ut_subway/chain_link
{
qer_editorimage textures/ut_subway/fence.tga
surfaceparm trans
//surfaceparm nonsolid
//DeformVertexes autosprite2
cull none
nopicmip
{
map textures/ut_subway/fence.tga
blendFunc GL_ONE GL_ZERO
alphaFunc GE128
depthWrite
rgbGen identity
}
{
map $lightmap
rgbGen identity
blendFunc GL_DST_COLOR GL_ZERO
depthFunc equal
}
}
This is fragment of shader file for "ut4_subway" map. I pasted 2 shaders from it - for plant_bush01 and chain_link. Your shader file will also consists several shaders written by you.
The most basic shader will consist at least one texture and one script for it. By the time You will learn to create complicated ones, to achieve special and unique effects for your map. Complete manual explaing all the parameters, strings and variables is here: here
Like famous Rayne said once: 'It's all in the shaders'.
