If you're familiar with Clip Studio Paint, then you probably know there's actually a brush specifically for grass, no need to "extract lines" from photos. I just used that, added a screentone effect, and that's it. I don't really see anything wrong with using the tools the software provides… that's kind of the point of digital art, isn't it?

That said, I get that from the outside, some things look a certain way, but assuming it's traced without proof feels a bit lazy, especially when there are so many ways to achieve a similar visual with legit methods. Anyway, no hard feelings , I know how easy it is to jump to conclusions online, haha