Pretty annoying there’s no easy built in way to not show images based on hidden file attribute. Best I could determine, one must implement dos “attrib” command or equivalent from PHP “exec” on every file in order to respect hidden file attribute (that sounds like way too much overhead to add on to my already pokey image gallery). I’m floored file attribs aren’t part of a more robust PHP file object but I guess this kind of stuff is hard to support in an OS neutral way. I decided to run with renaming to .file.jpg and then hide those. Using ‘dot’ to represent hidden is very standard and pretty straightforward to accomplish the hiding via Zenphoto’s image_filter plugin API. Zenphoto team provides generic image_filter sample to start with here: http://www.zenphoto.org/news/filter-file_searches My dot file specific implementation (zero rocket science here): https://docs.google.com/open?id=0B5htuLP66oWlOFRnSElPVktlVTA Drop php file in your zenphotoplugins folder and enable via admin > plugins tab.