Quest markers - voxraygames/worldbuilding GitHub Wiki
See also Action Editor
Using quest marker entities
When designing a quest, you may want to indicate a location to the player.
You can do this by placing a quest marker where you want the player to go. For example, a quest marker is placed near this pile of stones to indicate to the player where they can look to mine stones.
To attach this quest marker to a quest, make sure that the ID of quest marker is the same as the quest. You can tell if this is done correctly because the quest marker's tooltip will have the name of your quest.
See here that action ID of the quest and the quest marker are both "mine stone".
Using monsters as quest markers
Sometimes you want the player to mark one or more monster as quest targets. You can do this the same way as with the quest marker entities. For example, here we mark the pig with the action ID "killpigs", which is also the ID for the quest.
Using a quest marker for NPC navigation
A quest marker can also be used to indicate where an NPC should walk to. This is set in the same way as a quest location, but instead you mark the action with the "Walk to Marker" NPC animation.
Take a look at dev/npc_navigation_test.world
for some examples