It does look like in-game screenshot with some dirk mask or whatnot. If you zoom on the grass you can see the edges are pixelated.
Exactly, that's the aliasing I'm talking about. That and it could even just be low quality foliage, which would make sense. Either way most definitely isn't something you'd do in concept art.
Why would they do a split like that?
This...have you ever looked at vegetation in video games closely? I don't know how else to answer this. This is very normal for video games to have vegetation look weird like that. It ESPECIALLY looks very normal for something from fromsoft.
the "aliasing" is either something going on with the resolution, or you're just seeing strokes that aren't clean.
No I'm talking about the actual aliasing that fantalas also sees on distinct blades of grass below the vegetation you've circled there. Actually in the bottom left of your circle you can see weird jagged edges on the grass. That is not something that someone drawing concept art does. It just isn't. I've lived with and follow people who do concept art. That is not something that they would do.
And again, are you not seeing the dome geometry top left? That is game geometry. No one would take a curve like that and divide it into edges.
What about the super faded out detail of the pillar? Nobody draws like that. Like. Nobody. Nobody draws something that faded. That is real geometry being occluded by a transparent effect. No one is going to do the detail that is there on the wall behind the weird squiggly middle of the dirt texture. You have to seriously strain to see it, but you can see a ton of detail exists there only to be occluded by a lower resolution dirt texture. That isn't how people do this stuff.
And surely you don't think the dung ball itself is painted right?
What am I supposed to be seeing from these obvious screenshots? I'm not seeing the cave nor the shot above, and to top it off, what's shown in that link is low res as fuck.
Go to the tweets posted at the bottom that have high res versions of the shots. As I said, I was bringing that up because the bug egg concept art you mentioned I knew for a fact I'd seen always accompanied by other screenshots. And sure enough it's because they were in the official press release screenshot folder. It doesn't make sense for that one to suddenly be the odd one out.
EDIT: Here is the press kit itself
en.bandainamcoent.eu