> Cousin Ricky<rickysttATyahooDOTcom>  wrote:
>> Why does Output_Alpha=on not work in 3.7 when a background{} is specified?
>
>    I haven't tested it, but does your background have transparency in its
> color map? Because I have this faint recollection that it was changed so
> that if it has, it would end up in the final image as such (and consequently
> if there's no transparency, no transparency would end up in the final
> image).
>

Effectively, if I remember correctly, the background now need a filter 
or transmit value to allow alpha transparency.


Alain

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