Not sure this is something that would be able to merge into core. This type of stuff is encourage to be addons instead.

But it is really just a single script, you can just plug it in an empty Node2D and use it when you need it.
Here's the script: pastebin.com/2LGpH149
The code's a bit messy tho.

It's just a single script I made for myself.

Here it is if you want to take a look around: pastebin.com/2LGpH149

Just plug it in inside a Node2D and setup the variable to track.
The code its a bit messy because its debug stuff, but I'm sure you can figure it out.

Great tip!
Just found out glb models uses backface culling properly when using "internal materials".

But they changed to "culling disabled" after extracting the materials.

It seems when you extract the material, it'll follow whatever blender's material cull settings is (the camera cull checkbox).

Here's what I was trying....

I thought it was all due to how small the coin was.
I had been messing around with the physics solver properties for quite a while trying to "fix" this.

Who knew the model's trimesh was the culprit all along.

@passivestar.bsky.social Excuse me, how were you able to have shadows inside the stencil?

I can't think of any way to have that be possible.
My shadows are also rendered in the outside world and are not stencil masked. I tried a few different things but none worked.

Agreed, I'm so dependent on this to orient myself in 3D that I had to make a godot addon just to add this to the engine so I could work in 3D scenes there.

I think you already saw this by now, but I made a video tutorial going over the problems and solutions here: www.youtube.com/watch?v=pXEX...