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On 12/31/2011 02:56 AM, Thomas de Groot wrote:
> On 31-12-2011 5:30, Cousin Ricky wrote:
>> Alain<aze### [at] qwerty org> wrote:
>>> Effectively, if I remember correctly, the background now need a filter
>>> or transmit value to allow alpha transparency.
>>
>> Thanks, that works. I guess it hasn't made it into the documentation yet.
>>
>
> It seems not indeed, or not clear enough. In section 3.1.2.4.1 Output
> File Type, the relevant paragraph reads (text put between * * by me):
>
> [quote]
> The alpha channel stores a transparency value for each pixel, just like
> there is also stored a value for red green and blue light for each
> pixel. In POV-Ray, when the alpha channel is turned on, *all areas of
> the image where the background is partly or fully visible will be partly
> or fully transparent*. Refractions of the background will also be
> transparent, but not reflections. Also anti-aliasing is taken into account
> [/quote]
>
> In highlighted phrase filter and transmit should be mentioned explicitly.
>
> Thomas
>
>
After re-reading the section, I guess a little clarification wouldn't
hurt. The highlighted section you mentioned has been changed ... also
found the same "Note" here:
http://wiki.povray.org/content/Documentation:Reference_Section_5#Using_the_Alpha_Channel
and changed it there too! Thanks everyone.
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