Resources.zip was a great edition to single player worlds. However, when a world (with resources.zip) is on a server, custom textures and sounds do not work on servers or LAN worlds. I assumed that each player's game would be prompted with a download for a resource pack (source: resources.zip inside the world file on the server). However, the server just used the default textures and ignored the resource pack. Same thing for LAN worlds, however I have not tested them.