Modify or hide the "You see [player] and [player] here" text.

[3Phen]

This could be used for, say, a dark room, where you can't tell whether anyone else is there unless they say something. Modifying it could be used to add description (some people in the vicinity are standing on top of the big rock platform, some people are standing at its base) without repetition, or to only reveal people in certain circumstances.

Combined with #94's on_say hook ("before_say"? "on_say_instead"?), this could be used to create pseudo-"solo" areas within a shared instance. You and your friend enter a mystical maze, but cannot see each other until you reach the exit, and you see your friend walk out shortly after you do.

The main reason I want this feature personally, is so that I can use single-location-maze tricks within a larger non-solo age. I'm planning a small procedurally generated maze inside a network of culverts – ideally, players can hear each other talking, but not see each other. If #94 is done, I'd add an "echoing voice" bit in speech text. (Hmm. Now it occurs to me that it's probably somewhat presumptuous to be planning around a potential tworld feature. My wishful thinking doesn't translate to less coding work on your end!)

[sophialuden]

The added-description usage is particularly nice in my opinion.