HELP: EXTERNAL graphic in Director and file formats with alpha channels

[Vegard Cock]

I am currently programming in course where we should use external graphic so
that
the user can update images etc. later on. At the time we are using JPG
images, but because it
is 24 bit it does not support the use of alpha channels. This causes white
pixels to appear around
the images and this is specially a problem in drag and drop exercises where
the user drag an element
over various backgrounds.

Does anyone have experience in using external graphics with other file
formats like PNG and TIFF?
Are there any limitations or other issues that we should be aware of when
selecting the file format?

As we are importing all the graphic from a photoshop file (the designer
place all the graphic), are there
any good extras for exporting the images from Director to TIFF or PNG after
everything is placed correctly
on screen?


Thanks

Vegard Cock

[Robert Tweed]

"Richie Bisset" <richie@rocket.nospam.co.uk> wrote in message
news:o5rtlv0aid0tmjvvgugmfb3ikmm22kktdu@4ax.com...

> I have not tried externally based .png files, however i've used them
> for internal members and the transparency is far superior to using any
> other file format. I'd say go with them.

People do however, commonly run into problems importing images with alpha
channels. Here's a thread on the subject from Google:

[url]http://tinyurl.com/mudz[/url]

[Robert Tweed]

"Robert Tweed" <robert@killingmoon.com> wrote in message
news:bjmqvp$lij$1@forums.macromedia.com...

>
> People do however, commonly run into problems importing images with alpha
> channels. Here's a thread on the subject from Google:
>
> [url]http://tinyurl.com/mudz[/url]

OE annoyingly posted that while I was in the middle of typing (damn
ctrl+enter shortcut!) - I was just about to add that this shouldn't pose
much of a problem because the workaround is simple enough, provided you know
about the problem in advance.

- Robert