Metaconcets can be directed or undirected. A director is required for any metaconcert containing more than 5 participants, but may be used for smaller concerts if desired.
For an undirected concert, each participant may contribute up to three quarters of their maximum output. A metaconcert skill check must be passed to join the concert. If there is sufficient time, the characters can take 20 on this.
If there is a director (who must have a minimum of ten ranks in the metaconcert skill), the metaconcert output is one half of the director's maximum output plus a percentage of the maximum output from the rest of the concert as follows:
Less than 100 participants: % equal to the metaconcert skill of the director
Between 100 and 1000 participants: % equal to half the metaconcert skill of the director
Between 1000 and 10000 participants: % equal to one quarter the metaconcert skill of the director
A metaconcert can be designed or undesigned. The MetaconcertDesign feat is required to design a metaconcert. A metaconcert must be designed if more than one metafaculty is to be used, unless each participant will be using only one faculty.
For an undirected metaconcert, using a design reduces the DC of the activity undertaken, and also removes the change of catastrophic failure.
For a directed metaconcert, using a design means that the director can incorporate significantly more of the other participants' maximum output:
percentage of the maximum output from the rest of the concert as follows:
Less than 100 participants: % equal to twice the metaconcert skill of the director
Between 100 and 1000 participants: % equal to the metaconcert skill of the director
Between 1000 and 10000 participants: % equal to one half the metaconcert skill of the director