source: downloads/Samples/Media/DeferredShadingMedia/deferred_post_minilight.material @ 5

// Auxilary lights

/// Reference material [geometry]
material DeferredShading/LightMaterial
{
    technique
    {
                pass
                {
                        // Don't disable depth test, because the light doesn't have to be rendered
                        // if the bounding geometry is obscured.
                        scene_blend add
                        depth_write off
                        depth_check on
                        lighting off
                        
                        
                        texture_unit
                        {
                                tex_address_mode clamp
                                filtering none
                        }
                        texture_unit
                        {
                                tex_address_mode clamp
                                filtering none
                        }
                }
        }
}
/// Reference material [quad]
material DeferredShading/LightMaterialQuad
{
    technique
    {
                pass
                {
                        scene_blend add
                        depth_write off
                        depth_check off
                        lighting off
                        
                        texture_unit
                        {
                                tex_address_mode clamp
                                filtering none
                        }
                        texture_unit
                        {
                                tex_address_mode clamp
                                filtering none
                        }
                }
        }
}