This system outputs a single tiling material instance. But the way textures are handled in 3D nowadays, it’s not recommended to use sprite sheets for anything other than VFX animations. You can’t get high quality results with sprite sheets, and it will be much more expensive to shift the sheet around for every material you want to create than to just separate them all into individual textures using shared samplers.
Guys, this system is only going to be on Trello until May 29th! Please go there and vote if you want to see it happen!