Static

From NWNWiki

Placeable objects in the NWN toolset can be marked useable or static. Static placeables cannot be interacted with and appear, for all intents and purposes, to be part of the tileset itself.

Static placeables cannot be useable and therefore cannot serve as containers. Marking a placeable as static should not be confused as simply marking a placeable as not useable. Static placeables are incorporated into the walkmesh of an area when it is loaded, whereas non static placeables (even those not marked as useable) are not. With this in mind, all placeables that are not meant to be interacted with and serve only aesthetic purposes should be marked as static in order to improve system performance and reduce potential lag (both related to walkmesh pathfinding calcuations).

Unlike other placeables (including non static but non useable ones), scripts assigned to a static placeable object do not run. The scripting functions DestroyObject and ApplyEffectToObject do not effect static placeables. The function SpeakString (as applied with AssignCommand) works, but behaves differently than non static placeables (the object's name is replaced with its model name, and its portrait does not appear).