I want to use a very light touch in portraying cultures in Flat Black as descendants of cultures prevalent on Earth in the early 21st Century. I don’t want to end up with caricarture-lands. Fureidis’ culture (like the others) ought to come out looking like something that developed in place over seven hundred years.
I do imagine Fureidis’ nudity taboo and obsession with cleanliness as the descendants of Islamic practice, but I’m going to try to write it as giving more of the vibe of Singapore and Japan than of Jakarta. With that and the prohibition against recreational drugs I think I’ve taken enough of Islam.
Loan-sharking and gambling are good fodder for the criminal underworld, of course. And the Mob meets Muslims might be a sufficient seed to grow Fureidis from. But I think I need a strong native element as well, and ought to find it before I extrapolate too much detail.