OS: Windows 10
Affinity Photo 2 version (latest version, had the same issue also with previous version(s))
Steps to reproduce:
Stich a panorama with PTGui (or take a panorama already stiched, some drones already stitch it, like in the example attached below), save as JPG or as JPEG2000
Open the image with Affinity Photo V2, edit it:
Layer > New Live Filter Layer > Sharpen > Clarity > set 100% clarity
Export the result
View the panorama with a 360 program like ptgui viewer, free trial available here: https://ptgui.com/download.html
Alternatively, use any other 360° panorama viewer, like Ricoh: https://support.theta360.com/en/download/
Result: the panorama have all a vertical line in the middle of the sky, see a few examples I published on 360cities.
Issue: If you just adjust contract/colors (I tested) etc you won't see the vertical line/artifact, I think the Clarity adjustment is the one messing the image up, higher the clarity, more visible the vertical line, like this one (from the examples attached, viewed with ptgui viewer).
More examples:
https://www.360cities.net/image/sigirino-sun-after-snow-switzerland
See vertical line on the left of the sun
https://www.360cities.net/image/monte-rovrasc-switzerland
rotate the image and notice near the lake, same vertical line
https://www.360cities.net/image/golden-hour-at-torricella-taverne-switzerland
rotate near the mountain, see again vertical line
This doesan't appen if I do not edit the image and apply contract/color/clarify corrections with Affinity Photo 2, see unaffected panorama (not edited with Affinity) as comparison:
https://www.360cities.net/image/torricella-at-dawn-1st-winter-snow-switzerland
See examples in attachment:
DJI_0027.JPG: original image stitched by the drone
DJI_0027_af.jpg: image edited with Affinity Photo: edited contract, added 100% clarity
DJI_0027_photoshop.jpg: image edited with Adobe Photoshop, edited clarity (+70% clarity), contrast, saturation
Comparing with Adobe Photoshop: Photoshop saves the image without such artifact.
I think the vertical line is produced at the edge of the imnage (left border or right border).
Hopefully you can fix this soon, so I can get rid of Photoshop and just use Affinity. Now in my drone workflows, if I use Affinity, professionally speaking, the result is unacceptable (can't sell a photo with such line in it).
