Visible from a Distance by Xavid

A thing can be visible from a distance, meaning you can examine it from adjacent rooms. This can be useful if you have something like a river where in adjacent room descriptions you say "To the west is a river.", but you don't want to make it a backdrop because you don't want the player to be able to interact with it in other ways from these adjacent rooms.

This is its own extension, rather than being part of Expanded Understanding, because it can slow down the examine command in larger games and won't always be used.