White Ryder nous apporta ses lumieres en ce 2005-09-15 22:25:
> Below is simple code that creates a 2D array of identical translucent boxes.
>  When I look at the array from such an angle that I'm looking through
> several surfaces, I see opaque artifacts.  Even stranger: The color of the
> artifacts gets *darker* as I increase the transmit value (i.e. make the
> objects more transparent).  If I decrease the transmit value, making the
> objects more opaque, the dark artifacts go away.  However, I don't want
> less translucent objects!
> 
> Is there any way to generate multiple translucent objects without producing
> this problem?  I'm running POV-Ray 3.6.1a.icl8.win32 under Win XP Pro.
> 
> Thanks!
> White Ryder
> 
You are reaching the max_trace_level. When the boxes are more opaque, the adc_bailout
kiks in giving 
you a color.
Add this line:
#global_settings{max_trace_level 15}
Adjust the value up until you have no more black spots. You can calculate the required
value easily. 
Count the number of boxes you have, multiply by 2 (each box have 2 surfaces) then add
1 for the 
backbround or whatever is behind all the boxes.
Read section 2.3.3.7 Max_Trace_Level in the documentation (or read it again).

Alain

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