Affinity Photo 2 - Using Black and white colour to Edit adjustments

[Abtex]

Hello,

I've recently upgraded to version Affinity Photo 2.5.7.  Before when I added an adjustment (Example Levels), I could use the paint brush to remove the effect (black) and to re add, I could use the white colour.

Since upgrading, when I add an adjustment I can still use the black to removed parts I don't want changed, but I can no longer use white to re add. Hopefully the attached video will explain better. 

Not sure if something has happened to my white 🙂. It's also not working for High pass Sharpen tool

 

Thanks

Marc

 

 

[GarryP]

The Blend Mode your are using with the Brush (on the Context Toolbar) is Linear Burn which will likely have little effect when painting with White in this case.

Try setting the Blend Mode to something else, for example Normal.

[Abtex]

Thanks, that is exactly my issue. I'm not sure how that got changed, but it's working again

Marc

[GarryP]

Good to know it’s working for you now.

Just in case anyone is interested, Linear Burn works like this:

• assuming RGB/8 for simplicity;
• with colour values between 0.0 (black = 0) and 1.0 (white = 255) inclusive;
• for each separate pixel RGB value;

1. take the value in the thing being applied to;
2. add it to the value in the thing being applied;
3. subtract 1 from the result.

Therefore, applying white to any RGB pixel with Linear Burn will give you:

• R + 1 (white) – 1 → R;
• G + 1 (white) – 1 → G;
• B + 1 (white) – 1 → B;
• RGB → RGB.