Infinite Patroling

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You can edit the monster to increase the activation distance. Likewise, you can set AutoRemoveAtPathEnd to false in the .ent file. This is all that is required. Using script areas with "collision patrolling" (if you will) does not do away with the activation distance issue. Constantly adding the patrol nodes to the monster doesn't get rid of the activation distance issue either, plus the patrol nodes remain in the monster's "memory" until cleared anyway. Also, having an infinite loop can prevent the game from working.