alpha channel question

[John Cuevas]

If I understand correctly, you want the red to be the background, and the picture to be in the tv? Put the red solid on the bottom and just use a rectangle mask around the picture that is needs to go in the tv.

Johnny Cuevas, Editor
Thinkck.com

“I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work.”
—THOMAS EDISON on inventing the light bulb.

[Eric Chard]

Nothing’s blocking the photo.

There’s a number of ways to approach this: a mask on the photo is probably the fastest.

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“Putting the HARM in ‘harmonica’ since 2005.”
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[Lefteris Sifidis]

I know I can do that with a mask, but I’d rather create that mask from the alpha and not with the pen tool. The reason is that the rectangle in the tv is not perfect rectangle (the corners are kind of round) and I want to learn the technique for more complex geometry, and I know it can be done (for the alpha converting to mask)

[John Cuevas]

To do what you want you need to make a “TV” with the screen filled in also(or just the screen). Then you could use that as an inverted matte for the red solid, or a alpha matte for the video you want to be in the tv.

Johnny Cuevas, Editor
Thinkck.com

“I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work.”
—THOMAS EDISON on inventing the light bulb.

[Eric Chard]

In that case, I suggest you examine the Silhouette modes and pre-comping.

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“Putting the HARM in ‘harmonica’ since 2005.”
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