Photoshop: Blend alpha layers

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  • Updated 2 weeks ago
  • (Edited)
I'll start from afar.

When you talk about "transparency shape layers" in my head I remember something like this:




But "transparency shape layers" hidden something, what will you see next.

And now to the main problem or issue.


Here 3 layers are one main and two overlapping it. And what is most remarkable is that they are in the same blending mode. But the resulting pixels are different. You will ask why? I do not know, but I know that it's because of the checkbox in the properties of the layer that it's called "transparency shape layers". And why is he doing a different mix of pixels with the same color with the same blending modes.

 I can also add something, the layers created using gradient fill and shape tool do not need to switch the "transparency format layers" checkbox. Than it is reasonable - a question. But I would like to know the answer of the developers about this.

 I'll add one more thing, saying that with the checkbox "transparency shape layers" color dodge does not work - it's not true. Since if you mix the brightness of 0 and the brightness from 1 to 255, we get 0, which completely corresponds to the formula color dodge. But the rest of the blending is like a simple blending of two layers with some opacity.

Two layers will be overlay:
1. background
2. foreground




1. Blending: Normal, transparency shape layers: toggle on
2. Blending: Color Dodge, transparency shape layers: toggle on
3. Blending: Color Dodge, transparency shape layers: toggle off




And the checkbox "transparency shape layers" is very similar to gradient fill or color fill or pattern fill, since it covers the entire workspace. In fact, this option is to apply layer effects to the pixels that you drew on workspace. The semantics of the "transparency shape layers" is clear, but it does more than just switch the modes of applying effects from the entire canvas to specific pixels.

By the way, if you create two uniform gradient layers one with 100% opacity and the other is different from 1% and 99% and give it a color dodge overlay mode, then you'll be surprised that it does not need a checkbox "transparency shape layers" that mixes it as needed without it.

Do not you think there is some understatement in all this?


I attach PSD file for reproduce these pixel ladders.
Photo of Maxim

Maxim

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Posted 2 weeks ago

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Photo of Maxim

Maxim

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I don't know but I can't  to edit my issue. Ok I want add some images for full picture.

By gradient fill

By color fill

It was about:
By the way, if you create two uniform gradient layers one with 100% opacity and the other is different from 1% and 99% and give it a color dodge overlay mode, then you'll be surprised that it does not need a checkbox "transparency shape layers" that mixes it as needed without it.

This I added to the comparison that the fill color is not the same as the fill gradients, in fact the fill colors work just like normal layers. But in this picture I showed 2 identical cases where the difference was opacity in one case 0 and in another 100 (but in fact where 100 there is not very important how many percentages, are important so that not 0)

Here link number one and link number two PSD.

P.S  I think that these examples are enough!

And finally I want to say that you need to add an option that will be called Blend transperency shapes layer - it will be honest!
(Edited)