Nareau
Explorer
Just to throw in my $.02:
I'd allow them to take 20 on a disguise check. If I felt like making it complicated, I'd put a cap on it:
If disguising to look "different from before", I'd limit their success to: 20 + highest spot modifier in the group + circumstantial bonuses (+8 or +10, depending on if the group is more than "just friends"...); Indeed, I might even allow the cap to be +2/person who's "aiding".
This is to reflect that as the makeup artist takes 20, he can only make improvements that he or his friends can spot. His friends are studying his work, taking 20 on their spot checks. They know what the original looks like, so they're really tough critics (+8 to their spot checks for being friends). They're all chipping in with their input, so they're aiding the best spotter. Easily, the cap will be 40-50, depending on how many people are helping and how good they are at spotting.
Chances are, the disguiser isn't going to hit that cap. Even taking 20, +10 ranks, +5 for "minor details", and another +2/person helping to disguise. But it's possible that you'd have a professional makeup artist doing great work, with a bunch of witless morons who can't spot worth a damn. The cap would certainly come into play there.
Spider
I'd allow them to take 20 on a disguise check. If I felt like making it complicated, I'd put a cap on it:
If disguising to look "different from before", I'd limit their success to: 20 + highest spot modifier in the group + circumstantial bonuses (+8 or +10, depending on if the group is more than "just friends"...); Indeed, I might even allow the cap to be +2/person who's "aiding".
This is to reflect that as the makeup artist takes 20, he can only make improvements that he or his friends can spot. His friends are studying his work, taking 20 on their spot checks. They know what the original looks like, so they're really tough critics (+8 to their spot checks for being friends). They're all chipping in with their input, so they're aiding the best spotter. Easily, the cap will be 40-50, depending on how many people are helping and how good they are at spotting.
Chances are, the disguiser isn't going to hit that cap. Even taking 20, +10 ranks, +5 for "minor details", and another +2/person helping to disguise. But it's possible that you'd have a professional makeup artist doing great work, with a bunch of witless morons who can't spot worth a damn. The cap would certainly come into play there.
Spider