Transparency and alpha channel


Hi guys, here my doubt: I know that to store transparency informations I have to add the alpha channel to an image and tweak it to get my transparency needs… If I created a new image with a transparency background, tweak the image, and save it as psd or tiff, I know I can get transparency informations in my image without adding an alpha channel… my question is: in which way these file formats store this transparency information considering that i have just the rgb channels? what are the differences between use this transparency in this way and use a standard alpha channel?

bye and thanks for any answears


The alpha channel is for software other than Photoshop.


Ok, thanks a lot :thumbsup:


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