Here you see how to view your materials in the material editor, how you can tweak their settings, export them to a .material file, and use them in a level.
One thing I forgot to mention is, what a .material file is.
Well, the .material file is just a script describing your material properties (glow, normal mapping, diffuse colour etc.) to Ogre, which is the graphics engine that GraLL 2 uses.
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