Issues exporting JPGs, or even PSD to LRClassic

[EDPhotographe]

editing some CR2 files from LRC to PS, No problem in PS, but the files back in LR have some issues (pixels bars and shades)
exporting to JPG fromPD or LR, same result

(see botton of file large bar and 4 small bars up)

[EDPhotographe]

got a clue... it is due to external Shadow applied to a group of layers 
anyone got thie issue, or the solution??

[D Fosse]

It's a problem with layer compositing. Post this on the feedback forum, this qualifies as a bona fide bug.

A few versions back PS introduced a new layer compositing engine. It was buggy at first, so there was a checkbox in preferences to "use legacy compositing". Then this box was removed, as the problems had supposedly been resolved. But apparently not.

Lightroom doesn't support layers, so it uses the flattened composite that Photoshop inserts in the file. That's why you see it there, but not in Photoshop.

[EDPhotographe]

thanks !
I just got rid of the effect... will find another way 😉