I'm relatively new to Adobe PrPcc/Encore CS6.
So far, I've only been able to preserve full 1920x1080 image quality in slideshows by creating them PrP, and then File > Export > Media > Blu Ray preset. (And then importing that .m2v/.wav file into Encore as a timeline.)
When I've instead created slideshows in Encore, as slideshow elements, I always get highly compressed (i.e., pixelated ugly) images in the final product, no matter what settings I used.
Has anyone else seen this same pattern? I guess I'm satisfied with the solution I've found. It takes a little extra work to figure out the exact duration of the images, but I have the opportunity of more creating control too.
Thoughts?