DEFINE_SURFACE_CLASSES
{
    m_sc_0
    {
    }

    m_sc_1
    {
        REFLECTIVE  = s_v_0
        ABSORPTIVE  = s_v_1
        TRANSPARENT = s_v_2
        CLAMP_CONCENTRATION s_v_3, = 0.00001
    }

    m_sc_2
    {
        MOLECULE_DENSITY
        {
            s_g_0' = 0.1
            s_g_1, = 0.2
            s_g_2; = 0.1
        }
        MOLECULE_NUMBER
        {
            s_g_3' = 100
            s_g_4, = 200
            s_g_5; = 100
        }
    }

    m_sc_3
    {
        VIZ_VALUE = 2
    }

    m_sc_4
    {
        REFLECTIVE  = s_v_0
        ABSORPTIVE  = s_v_1
        TRANSPARENT = s_v_2
        CLAMP_CONCENTRATION s_v_3, = 0.00001
        MOLECULE_DENSITY
        {
            s_g_0' = 0.1
            s_g_1, = 0.2
            s_g_2; = 0.1
        }
        MOLECULE_NUMBER
        {
            s_g_3' = 100
            s_g_4, = 200
            s_g_5; = 100
        }
        VIZ_VALUE = 1
    }
}