DirectionalLight Shadow Contact not working on Android device

[GGGomer]

Godot version

v3.3.3.stable.official [b973f99]

System information

Windows 10, GLES3, Android 11, Samsung A52 5G

Issue description

The "Contact" setting on DirectionalLight's Shadow is not functioning on Android devices.

Here's an image from the debug viewport on Windows

And here's an image of the same scene, same build on an android device.

Steps to reproduce

Create a scene with a staticbody floor + collisionshape + mesh.
create a rigidbody + collisionshape + mesh.
Set a directionallight somewhere in the scene.
set camera to see shadow of rigidbody
Drop rigidbody on staticbody from an arbitrary height.

Minimal reproduction project

Winkel.zip

[Calinou]

Contact shadows are known to be broken on many devices and will be removed in 4.0 as a result (replaced with shadow normal offset bias). Either way, contact shadows are slow to render and are not suited for mobile devices for performance reasons.

To reduce peter-panning in 3.x, play with the shadow bias, normal bias, bias split scale and max distance values. The ideal value depends on your light's angle (more grazing angles make it harder to hide peter-panning) and tolerance to shadow acne.