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Bug? linear burn duplicate different to adjustment


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As I understand it, when you add an adjustment layer but make no changes, then do a blend mode on it, it has the same effect as duplicating the original pixel layer and doing the same blend mode. Hence this provides a handy way of doing a duplicate blend without having to double the pixel count.

When you duplicate the background image and do a linear burn on the duplicate, you get a general image darkening, as I'd expect. But if you add an adjustment (eg. Curves or HSL) and do a linear burn on this (without making any adjustments) you get a very different effect - it looks half like a hard mix.

Bug?

Dave Straker

Cameras: Sony A7R2, RX100V

Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11"

Favourite word: Aha. For me and for others.

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That is WEIRD. I opened a fairly bland fog scene and added a curves adjustment. Without any adjusting I changed the curve to linear burn and the colors that appeared from an otherwise brownish photo

Affinity Designer 2.2.2075 & beta 2.3.1.2212 Affinity Photo 2.2.2075  beta 2.3.1.2212Affinity Publisher  2.2.2075 & beta 2.3.1.2212

Windows 11 Pro Version    22H2
OS build    22621.1928
Processor    Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz   2.90 GHz
Installed RAM    16.0 GB (15.7 GB usable)
System type    64-bit operating system, x64-based processor

yoda.png

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Mine was just a flat picture with no other layers until I added a curves adjustment and set it to linear burn

Affinity Designer 2.2.2075 & beta 2.3.1.2212 Affinity Photo 2.2.2075  beta 2.3.1.2212Affinity Publisher  2.2.2075 & beta 2.3.1.2212

Windows 11 Pro Version    22H2
OS build    22621.1928
Processor    Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz   2.90 GHz
Installed RAM    16.0 GB (15.7 GB usable)
System type    64-bit operating system, x64-based processor

yoda.png

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