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All about alpha: Adding transparency

All about alpha: Adding transparency: Digital Media Foundations
All about alpha: Adding transparency: Digital Media Foundations

While we have been exploring color using three channels until now, there's actually an important fourth: alpha. The alpha channel for each pixel defines the opacity of the pixel. The lower the opacity, the more of the background behind a pixel will be revealed. The alpha channel works in exactly the same way as the color channels, but the results when changing it can be surprising, because the outcome is a combination of foreground and background pixels. Learn more in this video.

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Skill Level Beginner
2h 14m
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