I'm working on a zf (zombie fortress) map for tf2 (red are survivors, blue are zombies) As fun extra I'm adding spider hunting, through the map will be about 30 spiders hidden, when blue collects them the timer goes down, when red collects them the timer goes up. Currently the few spiders I have for testing aren't moving, but are simply item_teamflags with props_halloween/smlprop_spider.mdl as custom model. I do however think it would be fun to have them crawling around a little bit (not too far, just along a fence or something similar), and have looked for ways to move them. I found func_door and func_movelinear, which probably aren't good enough since they can only move into 1 direction, so I was wondering if theres a way to dynamically change for example the movedir in movelinear? The other obvious way I found is with func_tracktrains, however I'm afraid that having a tracktrain for each spider isn't good for the players fps. (30 func_tracktrains with each its own path_track path) Any ideas?