Hi Nikko
sorry for delay.

I want to do the following:

I have many many pictures on my website and I want to create dynamic galleries.

Pictures are shown on different pages/posts/portfolios eg of different photographers.
I want to add categories or tags to the pictures to show all pictures from the wordpress-media-gallery with these attributes in one new gallery.
This works with posts, pages and portfolios that all have the same tag when I want to display them as a masonry — but I can’t find such a solution for a masonry-gallery.

I tried the plugin “Media Library Categories”
this works well for organizing the media-library, but Enfold does not recognize these categories.

I know this feature from next-gen-gallery (I own the professional version using it on a different website) — but the problem ist, that ngg uses its own folder-management and those pictures are not shown in the wp-media-gallery. So you often have pictures two times on the server (eg the featured images).
And, by the way, the website is running much faster when not using ngg :-)

So please tell me, if there is any way to create such dynamic masonry-galleries.

thanks a lot and greetings from Vienna
Esther