function l_special(shader, t_base, t_second, t_detail)
    shader:begin("lod", "lod")
        :blend(false, blend.one, blend.zero)
        :zb(true, true)
        :fog(false)
    shader:sampler("s_base"):texture(t_base)
    shader:sampler("s_hemi"):texture(t_base .. "_nm")
end