Updated on Oct 21, 2015 for current version of Portfolio52 (this tutorial was originally created under early PlayingCardDB version).
Yes, it is still possible to create an image stitch/collage in Portfolio52 like it was in PlayingCardDB. It's still pretty easy, but requires a few additional steps.
1) Go to your collection and select the 'List View' ( http://www.portfolio52.com/collection/
..<YOUR P52 User Number>/list/alphabetical). This is important because the other views pre-load the tuck back image which will then also get downloaded, which means you'll have to then sort them out later (unless you want them that is). Don't be alarmed by the apparent small size of the images, they actually are larger sized and just artificially reduced on this screen.
2) Scroll to the bottom of the page and click the 'Load More Decks' button, repeat over and over until it no longer appears and all decks are loaded.
3) Save the entire page (on windows in Chrome just right click on white part of page and select 'Save As', then be sure to use the 'Webpage, Complete' option)
4) Locate the saved files, sort by file type and remove all non image files. Most of the supporting site images are png format so should be easy to find, but you may want to scan through and delete any others that were missed. If the system's index has been run on your collection (if it's been 24 hours since you added a deck this should have already happened), then the number of files you now have should match the number of decks Portfolio52 says you have in your collection (duplicates are not counted in the totals).
5) Yes! You now have your entire collection in individual image files! Just use software of your choosing to generate a single collage from these source files or do whatever you wish.
NOTE - Some programs may not handle png or other files than jpg so you may want to convert any files that downloaded as other formats into jpg.
For downloadable programs I found Picasa
to be the best free option, although Shape Collage
is pretty great as well except it adds a watermark for free version. For online http://www.getloupe.com/
has the most options, but it adds watermarks for free version as well, leaving us with http://www.collage.com/
as the best free option. Most others I've seen are limited to around 20 or 100 images which would only work with small collections.
More examples here from these and other solutions at https://www.dropbox.com/sh/nzs762s2p0unxxm/AAD9dNhyKDKMADE50kXcAYkfa?dl=0
that also make it more obvious of the source (you can also hover over the images below and derive from the filename what app was used), but here's a few of each to give you an idea of what is possible.
There's a few tricks for each solution (for example, Picasa needs setting change to be able to even see the small photos, layout tricks, etc). If anybody needs help let me know, but this is pretty easy stuff for most if you are willing to spend a little time.