Re: Help needed with alpha channel

Hi, an alpha channel is a black and white image, which, when applied to another image, controls the transparency of the image to which it is applied. Areas of the alpha channel that are white remain visible after the alpha channel is applied. Areas that are black become transparent. For example if you have an image of a rose against a sky, and another image which shows a white silhouette of the same rose against a black background, if you apply the silhouette image as an alpha channel (in a program that understands alpha channels, like After Effects) to the colour image of the rose, the result is a rose with transparency all around it behind which you can add a new background.
And that's it
Pete

roguekeyframe.com