Dunno how one might have gotten there from here but a long time ago we had a fellow in our gun club who started doing work like that. At first his work was pretty crude and made me wonder why in the world he'd mess up a stock that way but in time he got better and eventually he got darn good at it. He eventually moved to metal engraving and while I've not heard from him in over 20 years the last I saw of his work he was getting pretty darn good at metal work.
I'm not saying it's by him but it is the kinda stuff he used to do. I'm sure there are folks like him all over the country who do such things.