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what is an alpha channel only


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#1 metalfenix

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Posted 22 May 2010 - 02:10 AM

i was reading something and it said. Concial Gradient. Trasperency mode, Alpha Channel Only.

How do you select alpha channel only?
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#2 APShredder

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Posted 22 May 2010 - 02:19 AM

They were probably referring to the Color mode of the gradient tool. When using the gradient tool just change Posted Image to Posted Image in the toolbar neat the top of your screen.
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#3 metalfenix

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Posted 22 May 2010 - 02:35 AM

yes thats transperancy mode. but then whats the 'alpha channel'
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#4 BoltBait

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Posted 22 May 2010 - 02:39 AM

Each pixel has 4 channels: Red, Green, Blue, and Alpha.

The red channel tells you how red the pixel will be. Same for Green and Blue.

The Alpha channel tells you how transparent the pixel will be.
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#5 APShredder

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Posted 22 May 2010 - 02:40 AM

The alpha value of a pixel is how transparent that pixel is. If you press the 'More' button in the Paint.NET color window, you should be able to see a slider that says Transparency - Alpha. You can use this slider to change the alpha value of your primary and secondary colors.

Edit: Beaten.
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