I use transparent pngs all the time. I think you do have to use an alpha
channel, which Revolution just uses.
If GraphicConverter isn't creating a PNG with an alpha channel, that could
be why they aren't showing up as transparent in Revolution.
The nice thing about alpha channels is that you can have semi-transparencies.
At 04:05 PM 11/29/2005, you wrote:
Folks, I've got a number of small GIFs in an app, representing human
figures - therefore not rectangular. I managed to give each one a
transparent background and RR honours this when I import the GIFs as
images (i.e. the background information on the card shows up around
the shape of the figure).
I've now started to using PNGs rather than GIFS, and I can give them
transparent backgrounds in exactly the same way as the GIFs
(GraphicConverter on the Mac is really good for this - a lot simpler
than Photoshop Elements... but I digress). However when I import a
PNG as an image, the transparency disappears and the figure therefore
appears in a white rectangle. I can fix this with inks, but only on
the Mac, and this app is destined for PC users mostly.
I've looked at the docs, but I can't see a way of telling RR to use
the transparency in a PNG. I see a bit about Alpha Channels, but I
don't know if I'm using an Alpha Channel or not, and anyway I can't
understand how RR deals with them. I can of course convert all my
PNGs to GIFs, but is this the only solution? (This leads me to ask if
is there any disadvantage to using GIFs over PNGs - I kind of thought
there was, but I'm no longer sure why).
Can anyone clarify this for me?
TIA
Graham
----------------------------------------
Graham Samuel / The Living Fossil Co. / UK and France
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