We use a program in our studio called AVA CAD/CAM for wallcovering designs. We also use Adobe Bridge to browse our cloud storage which gives us great response times for populating thumbnail previews. The only files we have trouble with are .ava3/.ava4 files as it shows no previews for at all. I have been in touch with AVA support thinking it may have been something wrong on their end but, as far as they are aware, it is compatibility issues with Bridge. AVA support did say they use "Apple Quicklook technology to preview the files in search applications (like the Finder)". Pretty niche to our industry I understand but if this could be fixed in a future update, that would be superb.