Chrysoli,
The NWN engine will only bother displaying a placeable in-game if you are within a certain number of meters from it's model base. If you have a chest on the ground on a big flat open plane and then start walking away from it, it will eventually disappear from your view- even if your view distance is set to maximum and there's no fog or anything like that. If you start walking towards it, it will appear again. I can't remember what the distance is, and it's not quite as cut and dried as "take one more step away and it disappears, take one step closer and it reappears", but I think it's somewhere around 35-45 meters, maybe? Anyway, the chest sits right above its invisible model base.
When you have a flying model which is still a placeable, although the model appears to zip and fly around, the model base is still only in one spot, unmoving, just like the chest's. And so, as you go farther away from that (invisible) model base, the higher the chance that the flying model will disappear from your view, even though it might be right over your head and even though another player who's closer to the model base might see it still over your head even though you can't!
If you happen to be moving just into and just outside of the range of the placeable you may see the moving object at some unexpected point in its animation- or not, depending (probably) on how long you've been "too far" from the model base before re-entering the area of perception.
This effect is not seen in the toolset because all sorts of distance-culling is turned off so you can see everything you've placed in the area.
Unless there's something else at play, this is almost certainly the effect you're seeing. If you're using a script to randomly create the placeables, you could have it poll the location of a random player in the area and place the placeable (and it's invisible base) near the player who would be guaranteed to see the placeable as it zips by. Or you could simply create a greater number of them, knowing that at any given time only x percent of the players will be seeing them which is the only real hit since they don't consume more resources on the server to keep track of- more than any other placeable, anyway.
I documented the effect in
this video. When the video starts I'm standing right above/on the model's invisible model base. Hope that helps.
Modifié par OldTimeRadio, 28 mars 2011 - 05:21 .