0ad/binaries/data/mods/public/shaders/effects/los_interp.xml

<?xml version="1.0" encoding="utf-8"?>
<effect>

    <technique>
        <require shaders="glsl"/>
        <pass shader="glsl/los_interp">
		<blend src="src_alpha" dst="one_minus_src_alpha"/>
	</pass>
    </technique>

</effect>