As experienced Foundry mission authors have noticed when placing objects to be interacted with (either as mission objectives or to trigger other events), they don’t necessarily behave in an optimal way on space maps, at least not by default. Specifically:

  1. Interactable objects appear in-game framed by a white reticule, which is labeled at the top by whatever text was entered in the object’s Name field in the editor. If you leave the object’s default name in, that’s how the name will appear to other players. If you have named the object according to your own private, cryptic naming convention for map objects, that’s how the name will appear to other players.
  2. One specific type of object that’s commonly used for interactions is the “Invisible Object”, a cubic volume which comes in several sizes. However its placement is not entirely intuitive: As far as the editor is concerned, the “center” of the object is actually the center point of the cube’s bottom face. If, for example, you place an invisible object at the dead-center coordinates of a custom space map (X=0, Y=0, Z=0), the center of the object will be at X=0 and Z=0, but its Y-coordinate will be at some point above zero; how far above depends on how big the invisible object is. (Fortunately there is a handy conversion method for this, which I will explain below.)

For optimal results when placing interactable objects (invisible and otherwise) on space maps, remember to do the following:

  1. Once you have designated an object for use as either an Interact mission objective or a triggering object, give it the name you want players to see, even if it doesn’t fit whatever naming convention you use. (Unfortunately this may make the object harder to find in the map’s object list, if your naming convention is designed to organize objects.)
  2. To properly center an invisible object, place its Y-coordinate at -1/100 of the object’s size, relative to the desired center. Revisiting the example above, to place a 1000-ft invisible object at the dead center of the map, its coordinates should be X=0, Y=-10 (i.e. -1/100 * 1000), Z=0. For a 500-ft object, use Y=-5.