I forgot where in the subeta map I seen this shop, that said I can turn various stuff in and other stuff will come out? some of them have fixed recipe, and some just random. one of them was, two fox fur scarf can make a larger scarf, sadly I forgot the item's name and the places name ; ;

does the fox scarfs are one of the Faux Vulpine Stole that appears in steamwork shop?

The Alchemist Alchove is in Underground Shadowglen, and sometimes it has random results from its combinations. You need to have a zombie skin since Zosi won't deal with the living.

The Genetech Lab is in Darkside, the combinations there are fixed and unknown unless you look them up offsite.

Fantine's Bakery is in Veta, the combinations there are fixed and known.

thanks a lot! I found the place, it turns out the item is not from steamwork shops, oh well