I can see those same horizontal lines where the image is squished together on SF renders. I will make a ticket on GIT for this. And, yes, us beta testers ARE testing firefly and everything else. Some are more experienced with one aspect or another of Poser but not all. Please be kind. This is a beta release of the software and we are doing the best we can under the circumstances.

W10, Ryzen 5 1600x, 16Gb,RTX2060Super+GTX980, PP11, 11.3.740