I’ve just for the first time created a shared album on iCloud and connected Gallery 3 to it. I created the gallery using Apple Photos on a Mac. I’ve now got a couple of questions.
I didn’t create any thumbnails, nor as far as I can see did iCloud. If I inspect the gallery that is now on a website thanks to Gallery 3 it appears that each image in the album now has one. For example “imageX” which has a thumbnail of 257 x 342 px and a full size image 1537 x 2049 px. The actual image on ICloud is 3024 × 4032.
Did G3 create these smaller versions or iCloud?
Either way, this is a rather brilliant way to quickly create online galleries and embed into a website. I can’t believe I haven’t tried this option sooner!