We all know PNG is better than JPEG, hence the quality will always be better.
But I have an issue. I had numerous images deleted due to poor quality, these were JPEG images at 11k.
This weekend I started producing some new images, however, I took into consideration your comments on my other images.
I designed 3 images, all lossless PNG and at 8k, of course at this quality the file sizes are fairly large, some are more than 30Mb each, however, I receive a message stating "entity too large", which is referring to the file size.
At 8k and in PNG, there is no distortion, loss of quality, or anything else that would make these images outside your rules of submission.
I have tried other websites, and these new images uploaded with no issues.