Ilbranteloth
Explorer
This.
Even in the case of the pillowcase, I'd probably go for a roll to see just how well it worked. My 4 year old nephew might stuff it in there on top of the pillow with a nice, gem-shaped outline showing. I know enough to stuff it under the actual pillow. An accomplished Rogue might know a trick or two I don't -- including something like it being just as easy but more effective to jam it between the mattress and box spring.
So, other than the example of the 4-year old putting it in a place where it is not, well, hidden, can you explain the differences among a DC15, DC20 and DC25 hiding place in the pillowcase? Because to me, if it's hidden under the pillow in the pillowcase, a trivial search by feeling the pillow, picking it up, and such will find it. Whether it was hidden by a 20th level rogue, or a 4 year old that understands the difference between "hidden" and not.
Or to put it a different way, the DC of the pillowcase can't really be more than 10 or 15.
That's what I'm getting at.
I heard something on a podcast, the other day, that I think applies here (paraphrasing): "Most disconnects people have with skill systems is because they're trying to narrate the outcome before they roll the dice."
In this context, that means that the player should say "I hide the gem in the bedroom," roll the dice, then (maybe) declare exactly where in the bedroom they hid it. The player might be awesome at hiding things. If the character sucks, though, it doesn't matter how good the player's idea was. The character may not have thought of that location. They may have thought of it and executed it poorly. They may have thought of it but decided (wrongly) decided that something else was a good idea.
So, four PCs say, "I hide the gem in the bed."
- The Rogue with deft hands and a light touch rolls a 25, total. He runs his hand along the edge of the mattress and finds a seam loose enough to fit the gem through and tuck it into the bedding.
- The Sorcerer with a criminal background, but whose hands aren't quite as deft, rolls a 15, shoving the gem into the pocket created by tucking in the sheet at the foot of the bed and hidden by the comforter. Should be good until someone rubs against the bed or the maid comes.
- The agile, but honorable Monk rolls a 10, and slips the gem into the pillowcase. It's hidden from casual inspection, but any real search is going to find it quickly.
- The War Cleric is smart enough to know the Rogue has a good idea, but rolls a 2. His gauntlet gets stuck in the bedding and he's just pulling it out as the enemy shows up (or, leaves an obvious disturbance for the later search).
And what I had said before, is that the hiding place determines the DC to find it. So the pillowcase is a DC 10, no matter who hides it there.
I get what you're going for, which is that the die roll determines how successfully you hide it, but I would only really consider that if you were trying to hurriedly hide something before the guard got to the room. Then I might consider it a sleight of hand consideration (as you seem to imply here), but why would deft hands be required to find a good hiding place. Particularly if you had time to do so? Wouldn't intelligence, and taking a longer period of time to search for a better hiding place be more important?
If anything I'd probably say it would be an opposed Intelligence check - I can think of a place to hide it that you won't think to look. Or perhaps a Deception check with Intelligence as the modifier?
If you have all of the time in the world to hide it, I would suggest a maximum score (20 + your modifier) to identify a location, although the maximum DC is set by the best hiding place in the room. In other words, if it's an empty room other than a file cabinet, then you have only a few potential hiding places.
However, one thing to consider is that if the PCs are hiding something from an NPC, it probably makes sense to use something as a base rather than just the DM. Having said that, I'd probably go with 20 + Intelligence modifier + proficiency if you have the Deception skill. If the players can describe a particular hiding spot that I would have a basic DC for it, or other skills that apply, I'd be fine with that too.
Is it mandatory that you roll to hide something? Not at all. I remember the fun in AD&D of searching for traps by describing what the characters are doing, rather than just rolling. That's challenging the players and getting them involved. It's a totally valid style of play. Even today, I really hate the "I search the room" style of play where the fact that the vase is covered in contact poison doesn't matter (3E RAW). I'd prefer to have enough information about the scenario that it matters whether the players are paranoid about touching things, potentially exposing themselves to glyphs, etc.
But.... I also like it when a naive player is able to play a cunning/deft character. Conversely, I don't what the clever player with a Barbarian be able to offset dumped skills with his own abilities. Skills represent what the character is capable of. Some are just better at hiding stuff than others.
Also, live by the sword, die by the sword. If you want to fiat the DC for searching, go for it. As a player, though, don't complain when your sadistic DM uses his own creativity to set a crazy high DC for finding the gem the troll you were chasing hid. If your first reaction is "Trolls are stupid, so it shouldn't be able to hide stuff well," I don't disagree. Some PCs are stupid, too.
Even if you do decide to use a skill check, it's not always narratively interesting. You don't have to roll for everything. If it would be boring/uninteresting/whatever to play out the results of the goblin finding (or missing) the hidden gem, don't do it. Just decide, as a GM. That's why we play a game with a GM.
I'm definitely in the describe what you're doing camp, at least well before you make a die roll. I'll modify the roll based on what the players tell me, assuming I don't decide they just find it. While that doesn't always represent the differentiation between the character's skill and the player's skill, for things like this I think it's a good compromise,