Pippi Longstocking Goddess of War. (Id)

I published this, an alternate version of creation (I), by Style Transfer. I've seen people do it this way, with the default settings, but it has artifacts and is grainy in places. Does anyone know what settings to use so that it doesn't have those issues? I've tried the defaults and turning Fidelity all the way up. I'll try smoothing next time. Characters Collection: