Ulthar Press’s “Pickman’s Gallery” anthology. It’ll be coming out next February. The story in question is called “Pickman’s Model” — why, no, I am completely dead to shame — and it would be lovely if people picked up a copy of this book, when it comes out. Or even gave it a nice review on social media, once they’ve read it. I can’t speak to the other stories, but they must be equivalent in quality to mine; and my story is of course absolutely awesome.
PS Trust me: when this book has ordering information I will absolutely tell you what it is.