Lightroom 6: Slideshow quality in full screen terrible compared to Library fullscreen (F key)
Even with 1:1 previews rendered before playing the slideshow in full screen (high quality), pictures are totally soft compared to fullscreen previews hitting the F key.
The only way to get a sharp image in slideshow is to export a sharpened screen-sized jpeg automatically added to the catalog and then play a slideshow with those jpegs. But then the colors are off regardless of the embedded profile (sRGB, ProPhoto...). Even apple Preview will render a sharp and correctly color-managed screen-sized image from a 20 Mpx file...
This started to happen in LR5 but I don't remember which version of it for sure. It's still the same in 6.7.
Am I facing a bug due to my rather old hardware, or is the Slideshow module basically useless with raw images for everyone?
LR 6.7 and El Capitan (clean install) on MacBook pro 5.2 with dual GPU GeForce 9600M GT /GeForce 9400M (unsupported by LR6.7)