diff --git a/doc/classes/ProjectSettings.xml b/doc/classes/ProjectSettings.xml
index 742dcdabc1c..d1292b8029f 100644
--- a/doc/classes/ProjectSettings.xml
+++ b/doc/classes/ProjectSettings.xml
@@ -2237,8 +2237,10 @@
Sets which physics engine to use for 2D physics.
- "DEFAULT" and "GodotPhysics2D" are the same, as there is currently no alternative 2D physics server implemented.
- "Dummy" is a 2D physics server that does nothing and returns only dummy values, effectively disabling all 2D physics functionality.
+ [b]DEFAULT[/b] is currently equivalent to [b]GodotPhysics2D[/b], but may change in future releases. Select an explicit implementation if you want to ensure that your project stays on the same engine.
+ [b]GodotPhysics2D[/b] is Godot's internal 2D physics engine.
+ [b]Dummy[/b] is a 2D physics server that does nothing and returns only dummy values, effectively disabling all 2D physics functionality.
+ Third-party extensions and modules can add other physics engines to select with this setting.
If [code]true[/code], the 2D physics server runs on a separate thread, making better use of multi-core CPUs. If [code]false[/code], the 2D physics server runs on the main thread. Running the physics server on a separate thread can increase performance, but restricts API access to only physics process.
@@ -2316,8 +2318,11 @@
Sets which physics engine to use for 3D physics.
- "DEFAULT" and "GodotPhysics3D" are the same, as there is currently no alternative 3D physics server implemented.
- "Dummy" is a 3D physics server that does nothing and returns only dummy values, effectively disabling all 3D physics functionality.
+ [b]DEFAULT[/b] is currently equivalent to [b]GodotPhysics3D[/b], but may change in future releases. Select an explicit implementation if you want to ensure that your project stays on the same engine.
+ [b]GodotPhysics3D[/b] is Godot's internal 3D physics engine.
+ [b]Jolt Physics[/b] is an alternative physics engine that is generally faster and more reliable than [b]GodotPhysics3D[/b]. As it was recently implemented, it is currently considered experimental and its behavior may change in future releases.
+ [b]Dummy[/b] is a 3D physics server that does nothing and returns only dummy values, effectively disabling all 3D physics functionality.
+ Third-party extensions and modules can add other physics engines to select with this setting.
If [code]true[/code], the 3D physics server runs on a separate thread, making better use of multi-core CPUs. If [code]false[/code], the 3D physics server runs on the main thread. Running the physics server on a separate thread can increase performance, but restricts API access to only physics process.
diff --git a/doc/classes/WorldBoundaryShape3D.xml b/doc/classes/WorldBoundaryShape3D.xml
index 33609916a36..0f6224c40c8 100644
--- a/doc/classes/WorldBoundaryShape3D.xml
+++ b/doc/classes/WorldBoundaryShape3D.xml
@@ -5,6 +5,7 @@
A 3D world boundary shape, intended for use in physics. [WorldBoundaryShape3D] works like an infinite plane that forces all physics bodies to stay above it. The [member plane]'s normal determines which direction is considered as "above" and in the editor, the line over the plane represents this direction. It can for example be used for endless flat floors.
+ [b]Note:[/b] When the physics engine is set to [b]Jolt Physics[/b] in the project settings ([member ProjectSettings.physics/3d/physics_engine]), [WorldBoundaryShape3D] has a finite size (centered at the world origin). It can be adjusted by changing [member ProjectSettings.physics/jolt_physics_3d/limits/world_boundary_shape_size].