Thanks for the feedback. Custom folders are not possible to add to the library at this time. This is something we'll consider adding in a future version. You can save materials as well as smart materials to the library system. To save a new material, create a material from the material editor and drag it into the library.…
Another Couple Suggestions, Maybe I cant find the feature but the user library is limited right now, I would like to be able to add my own folders, Currently if you add your own folder it doesn't show up in the library. It would also be nice to be able to save a regular material instead of a smart material. Some…