Hi all, I have been using this handy website to shrink down the sizes of PNG files that I use when working with Mesh. It is https://tinypng.com/ and has a solid free option.
very good - I really couldn’t see any difference between the original and ‘shrunk’ versions on their page.
It is very nice. I have managed to save 90% of the file size from PNG’s without any noticeable difference.