In plasmashell I noticed very poor quality of displaying the wallpaper images. They seem like being very aggresively jpeg-compressed - blurry, lacking details, sometimes artifacted. See the attached screenshots with the very same image shown as desktop wallpaper and gwenview at ~ the same scale. Reproducible: Always Actual Results: The wallpaper looks ugly Expected Results: The wallpaper looks like it should
Created attachment 93329 [details] screenshot #1
Created attachment 93330 [details] screenshot #2
The desktop image size exceeds the screen resolution and the positioning is 'Scaled & Cropped'. I never noticed such degradation of the image quality in plasma from KDE 4, not other DE's. Positioning: Centered and Tiled don't work at all (see the additional screenshots)
Created attachment 93331 [details] broken Tiled positioning
Created attachment 93332 [details] broken Centered positioning
*** This bug has been marked as a duplicate of bug 338506 ***