How should I create knockouts in polygons?

[mathias17]

My 2D game project uses large polygons to create ground texture where need be.
One polygon looks like this:

The need has arisen to cut holes in these large polygons, creating holes in the ground which the player can see through.
Something like this: (this image is just a photoshopped edit)

How should I go about doing this?

Is using Goost recommended?
I don't know if Goost and 4.0 will play nice together.
Goost's polygon booleans seem good:

[Zireael07]

Goost is a completely separate customized Godot editor. I am 90% certain it's based on 3.x branch.

Old discussion on how to achieve it in Godot itself: godotengine/godot#35676 (Goost just uses an updated, less buggy, version of the library used for polygons, and a slightly different API)

[theraot]

MrElipteach has videos on the subject (and without using Goost):

• SUPER EASY 2D DESTRUCTIBLE TERRAIN in Godot
• The MOST UNDERRATED Godot tool (GEOMETRY CLASS)

Addendum: Here is repository he mentions https://github.com/matterda/godot-destructible-terrain