Half-Way Transparent

[Taxicab Messiah]

I believe this image is 50% transparent.  The background isn't checkered white and black but grey and black.  And it absolutely shows through the underlying images but not fully.  I know there is a way to turn this into a fully transparent png in Affinity but unsure how to go about it.  Any ideas?  I've already tried the blend option > source layer range trick but it's greyed out.

[thomaso]

33 minutes ago, Taxicab Messiah said:

I know there is a way to turn this into a fully transparent png in Affinity but unsure how to go about it.  Any ideas? 

Do you want to achieve 100% transparency – or 100% opacity? – However, a levels adjustment can help to increase or reduce transparency:

51 minutes ago, Taxicab Messiah said:

I've already tried the blend option > source layer range trick but it's greyed out.

I never saw it greyed-out. Can you show a screenshot of your Layers panel with opened Blend Options? – I am not sure what you mean with fully transparent, "fully" could simply be achieved in the Layers panel either with the layer opacity = 0 or by deselected layer visibility.

[Taxicab Messiah]

I think I made the mistake of not selecting the layer when looking at the source layer because it's now functional.  I double checked when you pushed me on it.  But yes, it's a half transparent image (background).  I was looking to make the sparks evident on a fully transparent background however the source layer trick gives me this odd transition so I think I'll just leave the image alone.  Thanks, everyone, for responding!

[GarryP]

Another option, in some cases, but particularly for this case, in Photo only, could be to fill the alpha channel via the Channels Panel.

See attached video where you can see the transparency chequerboard before I make the action.

[Taxicab Messiah]

Oooh interesting.  I'll try the opposite option: clear.  And see if that kills the background.

[GarryP]

1 hour ago, Taxicab Messiah said:

I'll try the opposite option: clear.  And see if that kills the background.

That will probably make the whole image transparent as it sets the opacity of every pixel in the layer to zero.

When you’re working with the Alpha you are working only with opacity and not colour so, in the case you mentioned, all the pixels will be the same colour as they were but you won’t be able to see them.