Wasn't it Chrisblob who wrote:
>
>Next question, I have thousands of png images in a directory to use as the
>individual frames for my projected movie. They are image0001.png,
>image0002.png,
>image0003.png etc... What syntax do I need to load the filename
>imagennnn.png,
>where nnnn is the frame number?

#declare FILE = concat("image",  str(frame_number, -4, 0),  ".png");
... 
  pigment {image_map {png FILE}}

When the second parameter (minimum output length) of str() is negative,
the result is padded with leading zeroes instead of spaces.

-- 
Mike Williams
Gentleman of Leisure

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