The Firebird
Commoner
The post I was quoting was about resolving obstacles, not generating them. When I am resolving obstacles, I do so as an observer--my narration is constrained by the state of the game world and the rules of the game.By deciding how many, and what kind of, and the difficulty of, obstacles exist between the PCs and their goal, you become a participant.
This becomes most obvious when the PCs present a new goal, for which the GM has not previously prepped, but is true in general.
When I generate new obstacles I am participating in a more obvious way. But in that case, is my saying "there are 3 guards on this wall with watches changing every 4 hours...etc." a different type of participation than "bypassing this wall/guards is a complexity 3 skill challenge"? How?