Rules Around Instancing:

• Each uniquely instanced area is loaded from disk preserving the original state of that area
  • Any changes to the area during run time, Created or Destroyed Objects will not follow to the instanced version.
  • Walkmesh is shared among each instance to reduce lag and lower memory usage
• Can only instance an area that is created in the toolset and has it's own .TRX / Walkmesh.
  
  • You cannot instance an instance of an area.
• Instances created can never be deleted (NWN2 has no way of deleting Areas or Freeing Memory)
• Everytime you create a unique instance of an area, the memory footprint in RAM will increase to allocate space for this instance, as a side effect -  all instances of a single area will be reallocated in RAM and their tags will be reset to the same as the base area (More on this below)