Possible to make a bigger zone feature like a river or lake?

[Woodhouse3D]

I'm currently testing out the zone feature, and I want to put large features like lakes, rivers, and mountains.
Further, I was playing the original Zork recently and its zone map has many intractable objects in its zone, such as a climbable cliffs, or a house that you can walk all the way around. Is more planned for the zone feature?

[Woodhouse3D]

partial answer: In the zone descriptions attribute, you can include functions to determine whether a description is shown. So you can create custom shapes to describe these features.

[ThePix]

You should be able to use borders to do this. This will give you a rectangular lake, 4 by 2, but you could do more complex shapes by making the function more complicated.

createItem("lake", ZONE_BORDER('desert'), {
  examine:"It looks very deep!",
  scenery:true,
  border:function(x, y) {
    return (x > 3 && x < 8 && y > 7 && y < 10)
  },
  borderDesc:"There is a big lake here.",
})