I have used the parallax feature Marmoset Toolbag 3 has and it's honestly pretty great imo for saving a lot of time compared to displacement, whilst still getting the same result when also using a normal map with it. If this isn't too much to ask, I would also to see this supported with Corona as a compromise for those who like the pros of displacement but don't want to deal with any inconvenient issues it may bring and/or just want to save more time. I remember several months back when I saw a message by Ondra 6 years ago saying that "This is too big fake suitable for games, but not for realistic renderer", and while it's true that it's usually good for games, that doesn't necessarily devalue it's efficiency in both games and high-end CG renders imo. I personally don't think that should be a reason to *not* include it, but that's just what I think. Either way, this renderer is pretty great, which is why I think (if it aint too much) it would be great to have both displacement and parallax options for the user.