is the traveller electric or nah? (Or is it something like a tube with ball bearings in with the wire across the river going through it?),(reply>), Just a pulley wheel. nothing too fancy.,(reply>), Traveler win be purely passive. Probably either pulleys or BBs,(reply>), It's the same as a zip line.,(reply>), thanks for the replies!,(reply>), It's probably got several wheels that roll along it," like this: <a href=""https://blenderartists.org/forum/attachment.php?attachmentid=13124&amp;d=1164026257"">https://blenderartists.org/forum/attachment.php?attachmentid=13124&amp;d=1164026257</a>"