[Bullet] No shape ID in a result of RayCast against PhysicsBody with multiple ConcavePolygonShapes.

[dmitrijbes]

Godot version

v3.5.rc4.official [e047c50]

System information

Windows 10

Issue description

According to doc intersect_ray must have shape id in resulting Dict.
However, its always 0.

This issue was already reported and fixed in #55533.
According to changelog it must be fixed in 3.5 rc4.

It doesn't.

Steps to reproduce

1. Create 2 Shapes and add to StaticBody.
2. Racayst shapes using intersect_ray.
3. Look for shape id in raycast result Dict.

You can find example in attached MRP.

Minimal reproduction project

raycast_shape_bug.zip

[dmitrijbes]

I dug into it more and stumble upon great research by pouleyKetchoupp.
In short, its a bug of Bullet integration, which was quick-fixed with exception:
Single PhysicsBody, which owns multiple ConcavePolygonShapes always return 0 instead of shape id.
As always with such things, this unlikely exception is exactly my case)

How To Fix
I circumvented issue by switching to GodotPhysics.
Project -> Project Settings -> Physics -> Physics Engine

Still would not close this issue, because solution is far from good and issue is not documented anywhere.
I spent several hours fixing it, hopefully this info will save someone's time)

[dmitrijbes]

Probably related to: #57452.