function normal(shader, t_base, t_second, t_detail)
    shader:begin("particle", "particle_add")
        :sorting(3, false)
        :blend(true, blend.one, blend.one)
        :aref(false, 0)
        :zb(true, false)
        :fog(false)

    shader:dx10texture("s_base", t_base)
    shader:dx10texture("s_position", "$user$position")

    shader:dx10sampler("smp_base")
    shader:dx10sampler("smp_nofilter")
end