Ability to convert a CollisionShape2D's visual representation to an OccluderPolygon2D

[Bluenix2]

Describe the project you are working on:
A simple arcade game. It uses light and collisionshapes.

Describe the problem or limitation you are having in your project:
Currently, it's hard to make a circle or other polygon with a OccluderPolygon2d

Describe the feature / enhancement and how it helps to overcome the problem or limitation:
I think either a setting to use the collisionshape of the parent node as a lightoccluder, or you can in the drop-down let users specify an already existing collisionshape (sibling-nodes)

Describe how your proposal will work, with code, pseudocode, mockups, and/or diagrams:
So far it doesn't make sense to have any code or any API for it.

In the red circle another option "From CollisionShape2d". There you can later specify a collision shape out of all the sibling nodes.

If this enhancement will not be used often, can it be worked around with a few lines of script?:
There is currently no way that this could be recreated in a simple manor.

Is there a reason why this should be core and not an add-on in the asset library?:
This could be such a broadly used feature. And very convenient for most cases when working with lightning.

[Calinou]

Related to godotengine/godot#6750.

Note that CollisionShape2Ds may be more precise than their visual representation suggests. Therefore, their visual representation would have to be used as a base for the LightOccluder2D as it needs to have a finite amount of polygons.

[Bluenix2]

Yes, the visual representation was what i had in mind and it would not be a problem since a LightOccluder2D doesn't need to be as precise as a CollisionShape2D needs to be.