>
Clipka wrote:
>
> I was well aware however that file formats with transparency support
> were sometimes created with the wrong alpha mode (heck, even POV-Ray
> itself did that prior to 3.7), so I provide a mechanism for users to
> override POV-Ray's defaults, by explicitly specifying "premultiplied
> off" or "premultiplied on" after the image file name.
>
> In your case, you'll want to use "premultiplied off".

Yes indeed, that does eliminate the 'hard-edged matte' quirkiness of my
fading-out TIFF image. Thanks for pointing this out. I'm embarrassed to admit
that I *did* read about the new 'premultiplied' keyword-- then promptly forgot
about it.  :-(  I just gave the docs there a good re-reading!  I actually wasn't
sure *why* it was necessary, until now. What a big difference it makes!

So all that remains is to find a fix for the previously-mentioned 'transmit all'
transparency problem, with its erroneous complementary colors etc.  ;-)

Thanks again for taking the time to explain this complex situation so well.

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