Is # of religions based on map size or on # of civs?

[Barking Iguana]

I thought it was # of civs. 5 religions for 10 civs; 5 religions for 8 civs. But playing the Tectonic map, I use a large map and 8 civs. Large has a default of 10 civs, but Tectonic tends to have fewer land hexes, so I reduce it. But it doesn't reduce the number of civs.

Is that expected behavior? a general bug? Is it a map script-related bug?

 

[Dragostea]

I'm pretty sure for the number of civs in the game you're playing, divide it by 2 and that's how many religions can be founded. I don't think it depends on the map's size but only on the number of civs. Although I'm probably incorrect, it seems like that shouldn't happen.

 

[HorseshoeHermit]

Map size. It depends on the expected number of civs for map size (8 for standard, 12 for huge).

Function is possible religions = ( # / 2 + 1 )