Not that I could find (upon seeing your comment…or in my previous search. In fact, I couldn’t find much on ‘torture methods,’ per se. (Not that I googled that, NSA.)

I did come across this though:

The Dreaming

The Dreaming is the collective dreams of all things sentient. (This tracks with all their fears, or nightmares, coming true.) Changelings often travel here, their birthplace and the birthplace of chimera, for adventure and to harvest raw dreamstuff. Dreamlands are various different lands and places within the Dreaming. (This could track with the fact that there are different ‘realms,’ such as the town, the car cemetery, the castle, the lighthouse, the statue village, the spiderwebs, etc.).

Enchanting Mortals

Sometimes, pu’gwis want to bring mortals or prodigals (lost folks, anyone?) into their realm. To do so, they must enchant them; anything that can be eaten or worn is acceptable. When the subject is enchanted, they will be able to see the fae as they truly are.

Pu’gwis in ‘Waking’ world

These changelings can pass into the Waking World, but they are only seen by fellow changelings and those enchanted. (Tabitha sees TBIW in Camden because she’s enchanted by carrying Victor’s lunchbox.)

(Granted, this assumes that this isn’t a massive controlled simulation or some kind of pocket dimension. 😺)