Controlling Transparency with Alpha Curves

When you have partially visible pixels, such as after selecting and refining hair, you may want to change the opacity of certain areas. A way you can do this is by using Curves to control the Alpha channel. It's not difficult -- here's how you can do it.

Free resources, including macros, palettes, etc. are here:

If you are a beginner, start here:

Image credit: Pexels: Chermiti Mohamed

[jlgflash]

Whaouuuu .... Excellent method ... You are my GOD ! .... Thank you very very much

[SuchContent]

It is _very useful_ for me. Tank you for sharing.

[kin-shingpang]

Just brilliant, now I will play with Alpha channel more.

[stevenlitvintchouk]

Your tutorials are uniformly excellent. I only switched to Affinity Photo less than two years ago, so I'm late to your tutorials, so I'm plowing through as many as I can now. Thanks for all your help!

[freetibet]

I’m constantly blown away by the depth of your knowledge Dave! I work on a daily basis in Affinity and your tutorials have helped me massively. Thank you so much!

[MrBobSingleton]

Great tutorial but I don't understand how the alpha curves act if you try to nest it in a layer. It doesnt seem to work the same so you can't see how the cutout is masking to the background

[selenitafm]

Wonderful subject to explain about! Great example

[BernieClark]

Excellent hopefully you will do a little demo to show how this can be used to refine

[edlondon]

Another great tip from Master Dave, Thanks!

[jlgflash]

I think with "Levels control' is more easy than with a 'courb control'

[jlgflash]

---> I think with "Levels control in position LAB on ALPHA ' is more easy than with a 'courb control'