urho3d/Bin/CoreData/Shaders/GLSL/Basic.xml

<shaders>
    <shader type="vs">
        <option name="Diff" define="DIFFMAP" />
        <option name="VCol" define="VERTEXCOLOR" />
        <variation name="" />
        <variation name="Skinned" define="SKINNED" />
        <variation name="Instanced" define="INSTANCED" />
        <variation name="Billboard" define="BILLBOARD" />
    </shader>
    <shader type="ps">
        <option name="Diff" define="DIFFMAP" exclude="Alpha" />
        <option name="Alpha" define="ALPHAMAP" exclude="Diff" />
        <option name="AlphaMask" define="ALPHAMASK" require="DIFFMAP" />
        <option name="VCol" define="VERTEXCOLOR" />
    </shader>
</shaders>