133 Messages
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5.1K Points
Photoshop: Allow transparency of gradients to be dithered
Most (all?) of the various forms of gradients in Photoshop can be dithered on their colour channels. I don’t believe there’s a way to dither on the alpha channel.
My example below uses shape layers, which is where I’d like to see the improvement, but I’d like to see the feature added across all gradient types.
There’s three gradients shown above. The top two are from solid colour to solid colour. The bottom gradient’s first stop is white, but with 0% opacity, so it shows the background.
Posterizing the document shows that the top two gradients are dithered, but the bottom one isn’t, even though dithering is on for that shape layer’s gradient.
It would be great if the dither check box also controlled dithering on the alpha channel.
My example below uses shape layers, which is where I’d like to see the improvement, but I’d like to see the feature added across all gradient types.
There’s three gradients shown above. The top two are from solid colour to solid colour. The bottom gradient’s first stop is white, but with 0% opacity, so it shows the background.
Posterizing the document shows that the top two gradients are dithered, but the bottom one isn’t, even though dithering is on for that shape layer’s gradient.
It would be great if the dither check box also controlled dithering on the alpha channel.
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Official Solution
chris_cox_2148894
15.1K Messages
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195.8K Points
7 years ago
2
chris_cox_2148894
15.1K Messages
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195.8K Points
7 years ago
Traditionally (going WAY back) gradients have avoided dithering the transparency values to avoid artifacts and less-than-desirable blending.
But if you have some real world examples of where this would help, I'll see what we can do. The biggest problem is going to be finding a place to put a control for this option (since it probably shouldn't be enabled with the simple dither switch).
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marc_edwards
133 Messages
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5.1K Points
7 years ago
I’m referring to alpha channels in the general sense, not specifically talking about Photoshop alpha channels.
Thanks.
Imagine you’re designing a website. Here’s part of the header with an awesome logo that contains a gradient.
The background of the website is set in CSS, so a sensible approach might be to use a PNG, set up so the background doesn’t need to be in the logo itself.
This would let me change the background by just editing the CSS.
If the alpha channel of the gradient was dithered, I think the quality of the result would be better, as can be seen to the left of the A.
The top item is the gradient drawn as a shape layer with a gradient fill. Just under that is the same logo posterized.
The item that’s second from the bottom uses a mask that was created with a Photoshop channel, so it can be dithered. Just under that is the same logo posterized.
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ken_robinson_7005555
1 Message
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62 Points
6 years ago
3
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babak_bostan
1 Message
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60 Points
5 years ago
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