Adjustment layers don't work after Erase White Paper

[Michael or Something]

1. Open an image

2. Filters - Colours -> Erase White Paper

3. Add any adjustment layer. It ignores the image and the sliders have no effect.

If I add a new pixel layer beneath the image and fill it with white, then the adjustment layers appear to work on the image, but when I hide or remove the pixel layer, the adjustment effect disappears with it.

It doesn't seem to matter how layers are grouped.

Am I missing something here? Surely I should be able to apply adjustments to images that happen to have some transparent areas.

[Old Bruce]

9 minutes ago, Michael or Something said:

1. Open an image

2. Filters - Colours -> Erase White Paper

3. Add any adjustment layer. It ignores the image and the sliders have no effect.

If I add a new pixel layer beneath the image and fill it with white, then the adjustment layers appear to work on the image, but when I hide or remove the pixel layer, the adjustment effect disappears with it.

It doesn't seem to matter how layers are grouped.

Am I missing something here? Surely I should be able to apply adjustments to images that happen to have some transparent areas.

I am not seeing that here. Could we see your Layers Studio in a screen shot?

[Dan C]

Hi Michael or Something,

Welcome to the forums

I too have tried to replicate this and I'm not seeing the same results that you are. If you could please attach a screenshot or a copy of your .afphoto file we can look into this for you!

[- S -]

I suspect you're using the 'Erase White Paper' filter on a black and white image?  In which case, what you see on the screen isn't actually varying shades of grey (RGB), but varying alpha levels (A).

If you're trying to use Levels and Curves on it, the Levels and Curves adjustment layers allow you to adjust the alpha channel by changing the drop-down from 'Master' to 'Alpha' (see below screenshots for layer layout, as the Levels/Curves adjustment layers need to be above the target layer rather than 'Child' layers; not sure why).  You can also change the colour by using 'Colour Overlay' in Layer Effects (FX).

 

[R C-R]

10 hours ago, - S - said:

(see below screenshots for layer layout, as the Levels/Curves adjustment layers need to be above the target layer rather than 'Child' layers; not sure why).

Does that seem like a bug to you? Adding a Levels adjustment to a file with a single RGB pixel layer in Affinity Photo 1.6 on my Mac with that layer selected adds it as a child layer. In that default position changing the RGB > Master or color black & white levels works as one would expect, but changing the RGB > Alpha levels has no effect at all ... unless the black level is set numerically higher than the white level, in which case nothing on the pixel layer is visible.

In the current 1.7 beta the behavior is the same, except that even with the pixel layer selected, the beta places the Levels layer above the pixel layer by default.

In both apps, I used the Erase Brush to create some partially & fully transparent areas on the pixel layer so there was some variation in its Alpha levels.

[lepr]

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[R C-R]

20 hours ago, Dan C said:

I too have tried to replicate this and I'm not seeing the same results that you are.

You should be able to replicate the issue if you apply a Levels adjustment in the default 'child' layer position & try to adjust Alpha values, due to the bug @- S - mentioned.

Edited March 16, 2019 by R C-R
Fixed wrong attribution -- thanks >|<

[lepr]

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