imagedata and alpha byte

[jbv]

On Wed, May 9, 2018 7:51 pm, Richmond Mathewson via use-livecode wrote:
> The inevitable question has to be why you are doing that in such a
> fiddly sort of way.
>
> Richmond.
>

It would be too long to explain, but in short some users of a client
app will modify pixels of images that will then be exported as PNG to
a server and then displayed in a website.
I have successfully modified the alpha channel of images with php for
years, and am just wondering why this doesn't work in LC...