This Addon doesn't replace vanilla original glass. As far as i know, we are currently unable to edit vanilla block's behavior. So i made additional glass instead of editing the vanilla ones. You can get them by opening the creative inventory, or craft them. Changelog Added additional 4 subpacks : Basic glass Clear glass Old glass Black-bordered glass Added glass pane. Changed '/function remove_detector' to '/function clear_cache'. Moved the glass to the glass item group.