Are the 'good' greens map specific?

[Formora]

Yh sometimes there is another chest than the normal ones we call it a big box cause its a little bit bigger. In these chests there are also good greens. So if u see one open it!

A good way of differentiating these chests would be, a one with rare greens has these "legs" attached to them. Those who haven't come across them will know when they see it, it's like the same chest with two little latches on it.

[Ellyidol]

A good way of differentiating these chests would be, a one with rare greens has these "legs" attached to them. Those who haven't come across them will know when they see it, it's like the same chest with two little latches on it.

Are these chests always present in the level? Reminds me of the rushing days on PL. They should be like mobs, only appear when a certain number is cleared.