I tried rendering the following code (the "D" from the "Dell" logo). But noticed
some abnormal variations when setting the transmit level at something other than
1.0 (The result can be viewed at
http://news.povray.org/web.4d69b460174945fc3690bb990%40news.povray.org)

Is this a bug or is there something I'm not doing correctly?



#declare f_height=1.20;
#declare f_width=1.1;
#declare f_inner_begin=0.40;
#declare o_d_of_dell=
prism {
        linear_sweep
        bezier_spline
        -1.00 ,1.00 , 36
        <0.00, 0.04>, < 0.00,  0.50>, < 0.00, 0.50>, <0.00, f_height>,
        <0.00, f_height>, <0.20, f_height>, <0.20, f_height>, <0.40, f_height>,
        <0.40, f_height>, < 0.65,  f_height>, < f_width, 1.15>, <f_width, 0.62>,
        <f_width, 0.62>, < f_width,  0.09>, < 0.65, 0.04>, <f_inner_begin,
0.04>,

        <f_inner_begin, 0.04>, <f_inner_begin, 0.22>, <f_inner_begin, 0.22>,
<f_inner_begin, 0.40>,
        <f_inner_begin, 0.40>, <0.64, 0.40>, <0.68, 0.53>, <0.68, 0.64>,
        <0.68, 0.64>, <0.68, 0.78>, <0.54, 0.84>, <0.40, 0.84>,
        <0.40, 0.84>, <0.40, 0.44>, <0.40, 0.44>, <0.40, 0.04>,




        <0.40, 0.04>, < 0.20,  0.04>, < 0.20, 0.04>, <0.00, 0.04>


        rotate<-90,0,0>
        translate<0,0,1>
      }

object{ o_d_of_dell pigment{color White transmit 0.80} rotate y*0 rotate x*0}

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