DrSpunj
Explorer
DarkMaster said:Having one roll for everything remove a lot of outcomes to different actions. Being seen and being heard while sneaking will have two completly different outcome. The guard might hear the rogue, but he doesn't where the sound comes from and will have to investigate, the rogue can then uses an illusion or another ability to fool the guard into beleiving that it is something else. and I don't think yours maths can take that into account.
But having two detector skills keeps those distinctions, DM! If the guard can detect the Rogue through Sense or Spot he must choose which skill to use, but because both are effectively being used he gets a +2 circumstance bonus on whichever one he uses.
To continue your example, if he chooses to roll a Sense check and beats the Rogue's Sneak check then he's heard the Rogue. As you say, the guard will then know the direction and approximate distance (as outlined in Nail's first post) of where the sound originated. The Rogue will still get his chance to use Illusion magic (though it better be a Silenced spell (& perhaps Stilled as well if the Rogue can be seen making Somatic gestures) or he gives the guard another reactive Sense check) or another ability to fool the guard.
If the guard chose to roll Spot and succeeded then he's spotted the Rogue. Depending on the situation he may not be able to charge the Rogue (if he's up on the balcony, across the chasm, etc.) but he's definitely Spotted him and can react appropriately.
If the situation means that there is no chance to Spot the Rogue, only hear him, then the DM needs to give the guard a Sense check only (he can't choose to roll a Spot check, even if he has a lot more ranks in that skill), same as it is in the RAW for Listen & Spot.
The DM still has control over which of the detector skills are appropriate to use in any situation. Sense is essentially "Listen plus other stuff", so the vast majority of the RAW are kept intact. That's very important to us as it keeps the ripple effect at manageable level, IMO.
Thanks.
DrSpunj