Converting DND 3.5 DC to DFRPG

[sir_pudding]

Originally Posted by Rasputin

Or, let me put it another way: using DC 10 as task difficulty ±0 will lead to a lot more bonuses on rolls than we're used to seeing in GURPS.

No, the converse would be the case. Your method says DC 15 = +0 whereas my proposal has it at -1.

You are right about many specific tasks though. Though not all. Identifying a dire panther is probably not more than +0, for example, but that is probably coincidence resulting from the CR system more than anything.

[Rasputin]

Originally Posted by sir_pudding

If you are converting adventures meant for low level characters for 250 point delvers having tasks be -1 instead of +0 is probably a feature.

Originally Posted by sir_pudding

No, the converse would be the case. Your method says DC 15 = +0 whereas my proposal has it at -1.

You're right about the sign, though the amount is -2 (there’s no way lowering the chance of success 25% is a mere -1 in GURPS, as the biggest jump on the 3d6 chart is half that for adding 1). But you’re flat out wrong about most rolls being at -1 (or -2) being a feature; it’s a bug. It’s annoying to figure and remember (D&D phased out many little such modifiers for this reason starting in 4e), it hoses the players who bought their skills at 15 or 18 or whatever and expect to be rolling at those levels most of the time.

Furthermore, they’re 250 points. A 1st level D&D character is expected to be able to make a DC 15 roll half the time in something they’re good at, and he’s weaker than a 250-point DF character. Not only is a DC save common for a first level character, but a DC 15 AC (if you want to think of it that way) is common at that level as well, even without a Dex bonus (GURPS Dodge). A 250 point DF character is something like a 6th level D&D character; he’s supposed to be making rolls with ease. They’re supposed to be cruising through adventures for low-level characters.

[sir_pudding]

Originally Posted by Rasputin

You're right about the sign, though the amount is -2 (there’s no way lowering the chance of success 25% is a mere -1 in GURPS, as the biggest jump on the 3d6 chart is half that for adding 1).

My proposal was just to use GURPS modifiers and base them when needed on the equivalent category label, it deliberately eschewed a rigorous mathematical approach because that kind of approach assumes DCs make much sense in the first place.

But you’re flat out wrong about most rolls being at -1 (or -2) being a feature; it’s a bug. It’s annoying to figure and remember (D&D phased out many little such modifiers for this reason starting in 4e), it hoses the players who bought their skills at 15 or 18 or whatever and expect to be rolling at those levels most of the time.

There are few examples of traps in DFRPG that are +0 to detect and disarm, so that would appear to be a bug that isn't already in the game.