How Can I Create an PNG with Alpha Transparency

SL
Posted By
Shalom_Levytam
Dec 4, 2007
Views
309
Replies
2
Status
Closed
Hi,

I was wondering if someone could help me create a PNG that when overlayed on an image only shows when its on top of black.

ie the image underneath is black and in some spots there is color. Wherever there is black I would like the overlayed png to show. Wherever there is color I would like to the overlayed png to be transparent.

Really appreciate any help,

Thanks

slevytam
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P
Phosphor
Dec 4, 2007
Create your graphic with the transparent areas where you want them; Save for Web as with Transparence checked. All there is to it.
SL
Shalom_Levytam
Dec 4, 2007
Thanks for your reply.

Trick is that the underlying image could change. So I don’t know ahead of time what areas need to be transparent in the overlayed image. (ie i can’t work with the underlying image)

The closest I have got to making this work is taking the overly image and making it a layer. Then I add a layer mask to this layer which is exactly the same image. Then I save for web as 24png. This sorta works but not properly.

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