urho3d/SourceAssets/Shaders/Deferred/Light.xml

<shaders>
    <shader name="Light" type="vs">
        <option name="Ortho" define="ORTHO" />
        <option name="Dir" define="DIRLIGHT" />
    </shader>
    <shader name="Light" type="ps">
        <option name="Ortho" define="ORTHO" exclude="Linear" />
        <option name="Linear" define="LINEAR" exclude="Ortho" />
        <variation name="Dir" define="DIRLIGHT" />
        <variation name="DirShadow">
            <define name="DIRLIGHT" />
            <define name="SHADOW" />
        </variation>
        <variation name="DirNegative" exclude="Spec">
            <define name="DIRLIGHT" />
            <define name="NEGATIVE" />
        </variation>
        <variation name="Point" define="POINTLIGHT" />
        <variation name="PointShadow">
            <define name="POINTLIGHT" />
            <define name="SHADOW" />
        </variation>
        <variation name="PointNegative" exclude="Spec">
            <define name="POINTLIGHT" />
            <define name="NEGATIVE" />
        </variation>
        <variation name="Spot" define="SPOTLIGHT" />
        <variation name="SpotShadow">
            <define name="SPOTLIGHT" />
            <define name="SHADOW" />
        </variation>
        <variation name="SpotNegative" exclude="Spec">
            <define name="SPOTLIGHT" />
            <define name="NEGATIVE" />
        </variation>
        <option name="Spec" define="SPECULAR" />
        <option name="HW" define="HWSHADOW" require="SHADOW" />
    </shader>
</shaders>