Material Files
Originally written by Fingernail & greebo on http://forums.thedarkmod.com/topic/127
What the Heck is a Material File?
The material files tell the engine, where to find the source files of the specified texture and what features it should have. If you're using the texture textures/darkmod/wall in your map, Doom looks up the name in the material definition and loads the according files.
A single material file can contain multiple material definitions. This is useful as textures that logically belong to each other (e.g. several wall textures) can be summarized in one material file (e.g. materials/darkmod_walls.mtr)
The .mtr files are read upon launching Doom 3 - changing your material file therefore requires restarting Doom.
Create a new Texture Definition
Provided you already saved your texture source file (the .tga or .dds) in the appropriate folder, you can go on and create your texture definition.
Open up or create your personal material file (it's stored in the materials/ folder, extension: .mtr) with your preferred text editor. There are existing guidelines for where texture definitions should go.
First, specify the name of your new material. If it is not a model texture, then the name should be include the path to the texture files. Example:
textures/darkmod/custom/wall1
Then, open up a squiggly bracket ({), and start to fill in the texture paths as below, changing the paths and names for your texture.
textures/darkmod/custom/wall1
{
qer_editorimage textures/darkmod/custom/wall1_ed.tga //editor image
diffusemap textures/darkmod/custom/wall1_d.tga //diffuse map
normalmap textures/darkmod/custom/wall1_local.tga //normal map
specularmap textures/darkmod/custom/wall1_s.tga //specular map
}
Use Tabs to seperate the single parts from each other. Close the definition with a close squiggly bracket (}).
Save the file. Now you can load your new texture in DoomEdit or DarkRadiant provided you did it all correctly.
Alternatively you can also have a look a the existing material files and learn from them.
