Recently I was working on an experiment to improve discoverability of items and materials in our library. I've made a prototype available online at this address: https://s3.amazonaws.com/fpcdn/static/explorer/index.html
The working principle here is grouping similar items together, so that you can get a quick overview and, at the same time, quickly jump to a group of items/textures of interest. You can reach any item in a collection in just a few clicks.
Several collections were created for the experiment. Some of them have items of one kind (barstools), some - a mixture of various types. All of them were grouped automatically using only visual features.
Feel free to explore it! Your suggestions and feedback is of course welcome!