
seebs |
Crafting appears to be limited to 8 hours per day of productive time using item creation feats.
I find no limits on scribing spells. Presumably, you need to sleep occasionally. But assuming you've got downtime, and possibly access to something like a ring of sustenance... How much time can you spend scribing spells? Is there an upper limit other than available wall-clock time or GM fiat?
For instance, if we have three weeks of downtime, I can do at most 21 8-hour days of crafting. But can I also do 21 8-hour days of scribing spells, and sleep two hours, and spend the other six partying? It seems like there is probably a limit somewhere, but I can't find one.

DM_Blake |

The "limit somewhere", as others have pointed out, and as the OP already suggested for item crafting in general, is 8 hours, as stated in the rules for item crafting.
Scrolls are magical items. The feat is named a little differently, (so is Brew Potion and Forge Ring), but the rules for crafting all the items, whether or not the word "craft" appears in the name of the feat, are all found under the Magical Items section, in the Magic Item Creation subsection - which includes the rules for scribing scrolls.

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More than 8 hours of any work would fall under the forced march rules, I think.
Instead of fatigue for walking the damage and fatigue would be hand cramps for precision writing and drafting.
As that seem a bit to harsh as a GM I would mostly try to find a good houserule, like applying a circumstantial modifiers to your spellcraft checks for comprehending spells of +1 to the DC for each extra hour and a night of sleep (or 2 hours with a ring of sustenance) only removing up to 6 point from the modifier.
That way you could do a lot of extra work for a few days or increase your working hours by a little for a long period.

Blindmage |

Whoops my bad. Ummm...well your just copying a scroll into your spell book or recopying a spell from an existing spellbook into another? Then yeah, I would imagine you could spend 8 hours crafting, 2 hours sleeping, and up to 14 hours transfering spells between spellbooks.
That's a lit of writing in a day! Your Hans would totally cramp up and be in a pretty rough state are a day or two.

seebs |
Well, this is an adventurer who, with normal buffs, has a con over 20.
I'm pretty sure this is a pure judgment call -- I don't see an actual rule anywhere. Relevance is, I have a budget to spend, and a wishlist, and an amount of time, and if I can't add spells to my book AND craft, it turns out that either I spend my money on gear and have no money left to buy spells, or I spend my time crafting gear, have money left to buy spells, but can't actually add the spells to a book...

el cuervo |

RAW:
"If you're a magus or wizard, you can spend 1 day of downtime to copy up to eight spells from other sources into your spellbook. If you're an alchemist, you can use this option to add new formulae to your formula book. If you're a witch, you can use this option to add spells to your familiar. You may spend Magic toward the cost of copying spells."

seebs |
More than 8 hours of any work would fall under the forced march rules, I think.
Instead of fatigue for walking the damage and fatigue would be hand cramps for precision writing and drafting.As that seem a bit to harsh as a GM I would mostly try to find a good houserule, like applying a circumstantial modifiers to your spellcraft checks for comprehending spells of +1 to the DC for each extra hour and a night of sleep (or 2 hours with a ring of sustenance) only removing up to 6 point from the modifier.
That way you could do a lot of extra work for a few days or increase your working hours by a little for a long period.
This is a pretty reasonable-sounding rule to me. In practice, spellcraft checks have been a non-issue for me for quite a while; I'm at +27 spellcraft, so on a natural 1 I can comprehend a level 13 spell. :) But I sort of like that balance, and it offers a way to mitigate the obvious overload.
I don't think it's clear that forced-march rules would apply, especially if you're doing two very different things during the day; I can't do much over 8 hours of a particular kind of work, but I can do 6-7 each of two different kinds of work, usually.

seebs |
RAW:
"If you're a magus or wizard, you can spend 1 day of downtime to copy up to eight spells from other sources into your spellbook. If you're an alchemist, you can use this option to add new formulae to your formula book. If you're a witch, you can use this option to add spells to your familiar. You may spend Magic toward the cost of copying spells."
...
Wait, what? That sounds like the Ultimate Campaign downtime rules. But contrast with:
Time: The process takes 1 hour per spell level. Cantrips (0 levels spells) take 30 minutes to record.
... and somehow, I have spent all this time thinking it was one hour per page, so I was computing the number of pages, and treating it as a number of hours. So I've been doing it wrong all along anyway. But we now have two contradictory rules-as-written.
I wonder if I can talk my GM into using the Ultimate Campaign rule, since that's much faster.

el cuervo |

el cuervo wrote:RAW:
"If you're a magus or wizard, you can spend 1 day of downtime to copy up to eight spells from other sources into your spellbook. If you're an alchemist, you can use this option to add new formulae to your formula book. If you're a witch, you can use this option to add spells to your familiar. You may spend Magic toward the cost of copying spells."
...
Wait, what? That sounds like the Ultimate Campaign downtime rules. But contrast with:
Quote:Time: The process takes 1 hour per spell level. Cantrips (0 levels spells) take 30 minutes to record.... and somehow, I have spent all this time thinking it was one hour per page, so I was computing the number of pages, and treating it as a number of hours. So I've been doing it wrong all along anyway. But we now have two contradictory rules-as-written.
I wonder if I can talk my GM into using the Ultimate Campaign rule, since that's much faster.
Note that it says UP TO 8 spells from other sources. I assume this means up to 8 spells, taking into account other limits such as spell level. Meaning, you could transfer 8 level 1 spells or 8 cantrips, but you'd be limited to just four 2nd level spells.
As for one hour per page, well the math works out to be the same, doesn't it? Isn't the rule 1 page per spell level? So a level 5 spell takes up 5 pages and so on?
[Edit] Yes, I was correct. From PRD:
"Space in the Spellbook: A spell takes up one page of the spellbook per spell level."
So 1 hour per spell level or 1 hour per spell page, you've got the same number.
Taking ALL of these rules into account, I'd say this means what I already thought but wasn't quite sure: you can copy up to 8 spells per day, taking into account the spell level and other limitations. That means 1 hour per spell level, and 8 spells at level 1. This is inline with all the other crafting/downtime rules, where you can only ever "work" up to 8 hours in a day. That's how I would rule it at my table, for sure.

DM_Blake |

seebs wrote:el cuervo wrote:RAW:
"If you're a magus or wizard, you can spend 1 day of downtime to copy up to eight spells from other sources into your spellbook. If you're an alchemist, you can use this option to add new formulae to your formula book. If you're a witch, you can use this option to add spells to your familiar. You may spend Magic toward the cost of copying spells."
...
Wait, what? That sounds like the Ultimate Campaign downtime rules. But contrast with:
Quote:Time: The process takes 1 hour per spell level. Cantrips (0 levels spells) take 30 minutes to record.... and somehow, I have spent all this time thinking it was one hour per page, so I was computing the number of pages, and treating it as a number of hours. So I've been doing it wrong all along anyway. But we now have two contradictory rules-as-written.
I wonder if I can talk my GM into using the Ultimate Campaign rule, since that's much faster.
Note that it says UP TO 8 spells from other sources. I assume this means up to 8 spells, taking into account other limits such as spell level. Meaning, you could transfer 8 level 1 spells or 8 cantrips, but you'd be limited to just four 2nd level spells.
As for one hour per page, well the math works out to be the same, doesn't it? Isn't the rule 1 page per spell level? So a level 5 spell takes up 5 pages and so on?
[Edit] Yes, I was correct. From PRD:
"Space in the Spellbook: A spell takes up one page of the spellbook per spell level."
So 1 hour per spell level or 1 hour per spell page, you've got the same number.
Taking ALL of these rules into account, I'd say this means what I already thought but wasn't quite sure: you can copy up to 8 spells per day, taking into account the spell level and other limitations. That means 1 hour per spell level, and 8 spells at level 1. This is inline with all the other crafting/downtime rules, where you can only ever "work" up to 8 hours in a day. That's how I would rule it at my...
Almost right. "1 day of downtime to copy up to 8 spells" could mean using all 24 hours to copy eight 3rd level spells. Or two 9th level spells and six 1st level spells. Or any combination that does not total more than 8 spells.
The 1 Hour per Spell Level rule still applies, so you cannot copy eight 4th level spells in one day of downtime because that would require 32 hours.
Also, the rules about getting proper sleep also apply, so it's best to spend some of that day sleeping, preferably 8 hours unless the ubiquitous Ring of Sustenance (or other similar stuff) is used.

seebs |
I confused the heck out of myself, and spent quite a while looking in 3.0E and 3.5E to try to figure out where I got a rule. I'd been using "one hour per level-plus-one", so, four hours for a level 3 spell, six hours for a level 5.
Well. Turns out that's effectively-right: You need one hour per spell to study it (plus a spellcraft check to decipher it), then one hour per level to inscribe it in a book.
Which in turn means that you can't copy eight new spells into a book in an 8-hour day, because the absolute minimum time would be half an hour of writing per cantrip, plus an hour to study them, and 8 hours would get you five cantrips and partway through learning another. That one hour "studying" doesn't seem to go away using read magic, either.

DM_Blake |

Incorporating the study time into the transcription time is like saying it takes me a week and three hours to drive from Los Angeles to San Diego because it took me a week to learn to drive.
Just being silly.
But the point is that we are talking about two different things. If you must do both, consecutively, then you're math looks good.
But you might not need to study the spells, such as if you could have previously studied those, say, studying an enemy's spellbook while you were adventuring, then you came home and spent a couple nights transcribing those studied spells. Or, you might be able to ignore the study time if a friendly wizard who is letting you copy his spellbook is also personally teaching you the spell as you transcribe it (though this is a gray area requiring GM approval). Finally, sometimes you're transcribing your OWN spells from one book to another, for safe-keeping - no study time required.