On 31-12-2011 5:30, Cousin Ricky wrote:
> Alain<aze### [at] qwertyorg>  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

Post a reply to this message