function normal(shader, t_base, t_second, t_detail)
    shader:begin("clouds", "clouds")
        :fog(false)
        :zb(false, false)
        :sorting(3, true)
        :blend(true, blend.srcalpha, blend.invsrcalpha)
    shader:sampler("s_clouds0"):texture("null"):wrap():f_anisotropic()
    shader:sampler("s_clouds1"):texture("null"):wrap():f_anisotropic()
end