please, handle them partially like plants...

i am reffering to the part that the location of plants, once "discovered" by the clients, are known to the client and displayed until the client gets different information.

since buildings cannot be rotated, and they are bound to the grid, it should be easy to replace the actual target-able "static NPC" structure with a "structure plant".

only difference should be that the data is updated via detection range, not the crappy 100m terrain update that is used for the "impassable terrain" information of buildings.