I have a problem that Lightroom is not exporting PNG's with transparency on some files. My process is usually this, if it might help: I import the RAW files, edit them, then send them trough Lightroom to edit them in Photoshop, making a transparent background. Then I rename the files and and export them in PNG's of 3 different resolutions (low medium and high). The files come out with a white background instead of transparent and I don't know why, it only happens in certain files...
The work around I'm doing is exporting the PNG trough Photoshop, importing those PNG to Lightroom to batch export the other medium and low resolutions.
Adobe Community Professional, May 30, 2021May 30, 2021
Rob_Cullen • Adobe Community Professional, May 30, 2021May 30, 2021
Lightroom-Classic will display PNG files in the library, but it cannot Export files while maintaining transparency! So do not try! LrC does not 'understand' transparency! So you must use Photoshop to create PNG files of different sizes as suggested by @Theresa J