> On 9/30/2010 7:16 PM, Brad wrote:
>> Notice that a lot of the blue stuff in the corners and edges of the
>> box is now
>> missing.
>>
>> The header (and so probably the relevant info) of my .pov file is below
> <snip>
>> The blue surface is defined by the color_isosurface flags at the
>> bottom, and
>> setting those from a rgbf to a purely rgb setting fixes the missing
>> surface that
>> I have in that picture. However, I want my iamage to be
>> semi-transparent. Is
>> there anything I can do?
>
> The cube in your black background piece also has a few artifacts showing
> up along the edges as well. I am guessing the problem is not in how you
> are coloring the boxes, but how you are bounding the objects involved.
>
> This is just a guess, but the artifacts do look like the coincident
> surface problem. If the transparent box is exactly the same size or in
> the same exact place as the surface you use to create the edges of the
> blue interior surface, the rays can't calculate which they hit first,
> and artifacts appear. More of your code would be useful to see if that
> is the issue, but you can try just scaling the visible box by some small
> amount to see if that corrects some or all of the problem.

The real problem is the background:
backgroung{rgb 255}

Changing it to:
backgroung{ rgb 1}
corrects the problem nicely.


Alain

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