Op 19-4-2024 om 13:27 schreef William F Pokorny:
> On 4/19/24 02:36, Thomas de Groot wrote:
>> I never used that wiki example though. I wonder if that is not
>> specifically for GIF image formats only...?
>
> You've got it Thomas. When you specify an integer rather than 'all' you
> are asking the 'filter' and 'transmit' keywords to modify an indexed
> image's filter / transmit value for a particular index 'n'. This is not
> possible with non-indexed images (probably not too, where indexes are
> out of range).
>
> Several image formats support internal formats using indexes / tables of
> color/grey values. I'm unsure of the complete, working / supported list
> for POV-Ray? The gif format is always indexed and it's certainly one
> which works.
>
> Bill P.
Thank you Bill. I suspected something like this but it has been such a
long time since I last manipulated gif-format images that the info had
become ghost-like in my mind...
--
Thomas
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