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We've seen how we can neutralize white using the Multiply blend mode, how we can neutralize black using the Screen blend mode, but what about other colors? What if we wanted to make the blue of the sky just fall away, so that we saw the birds on this more interesting background? Let's give it a go, and this is going to involve using advanced blending options. If I double-click on the layer, we come up to our Blending Options and these are the ones we are talking about. Unfortunately, this never works quite as well as you would like it to.
I've tried this countless times and only on a handful of occasions has it really worked to my liking. It's always a very near miss, but it's interesting. So I am going to show you it anyway and there may be something useful that we can do with it. So Blend If, I am going to change this to blue because that's the color that we want to have just fall away. And then I'm going to get the two sliders on the right-hand side and I am going to move these over to the left and as I do so, that original sky is just going to be peeled away like so.
Now the only problem there is that we end up with this very nasty fringing around each of the pelicans, which is totally unacceptable. I am going to go a little bit further than that down to about 180, which helps a bit, but what will help a bit more than that is if I separate now these two sliders, holding down the Option or Alt key and I can grab the right-hand portion and bring that back to where it began and that might help somewhat and it's helping somewhat.
But if I go too far with that then I reintroduce in the original blue. So this isn't going to work unfortunately. But it's given me a good idea, I think, and that is what if we had the shape of the birds on a solid white background. It might work really nicely across two pages of the double page spread. So I'm going to add a layer of white beneath Layer 0. I know that I want this layer to go beneath my current layer, I am going to hold down the Command key or the Ctrl key, I can click on Create New Layer.
I am then going to feel this layer with white by holding down Command or Ctrl and pressing my Backspace, Delete key. Now the only problem is that we see we've got blue fringing around the birds wings, also in the top left, we've got some original blue of the sky left. So I am going to go back to my Blending Options, we need to go a little bit further with the sliders so that falls away completely. And now to address the issue of the fringing around the wings, what I am going to do is I am going to convert the birds to black-and-white.
Since they're fairly monochromatic anyway, this is the lesser of the evils, rather than having blue on the edges of their wings. And that is the Blend If command.
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