diff --git a/core/project_settings.cpp b/core/project_settings.cpp
index f4a15d73a10..13c5a605f0b 100644
--- a/core/project_settings.cpp
+++ b/core/project_settings.cpp
@@ -1254,6 +1254,10 @@ ProjectSettings::ProjectSettings() {
 	custom_prop_info["physics/2d/thread_model"] = PropertyInfo(Variant::INT, "physics/2d/thread_model", PROPERTY_HINT_ENUM, "Single-Unsafe,Single-Safe,Multi-Threaded");
 	custom_prop_info["rendering/quality/intended_usage/framebuffer_allocation"] = PropertyInfo(Variant::INT, "rendering/quality/intended_usage/framebuffer_allocation", PROPERTY_HINT_ENUM, "2D,2D Without Sampling,3D,3D Without Effects");
 
+	// Required to make the project setting appear even if the physics engine is GodotPhysics,
+	// while also making it appear in the ProjectSettings class documentation.
+	GLOBAL_DEF("physics/3d/smooth_trimesh_collision", false);
+
 	GLOBAL_DEF("rendering/quality/filters/sharpen_intensity", 0.0);
 	custom_prop_info["rendering/quality/filters/sharpen_intensity"] = PropertyInfo(Variant::REAL, "rendering/quality/filters/sharpen_intensity", PROPERTY_HINT_RANGE, "0,1");
 
diff --git a/doc/classes/ProjectSettings.xml b/doc/classes/ProjectSettings.xml
index c7e413b868f..f53305d05d0 100644
--- a/doc/classes/ProjectSettings.xml
+++ b/doc/classes/ProjectSettings.xml
@@ -1138,6 +1138,10 @@
 			Sets which physics engine to use for 3D physics.
 			"DEFAULT" is currently the [url=https://bulletphysics.org]Bullet[/url] physics engine. The "GodotPhysics" engine is still supported as an alternative.
 		</member>
+		<member name="physics/3d/smooth_trimesh_collision" type="bool" setter="" getter="" default="false">
+			If [code]true[/code], smooths out collision with trimesh shapes ([ConcavePolygonShape]) by telling the Bullet physics engine to generate internal edge information for every trimesh shape created.
+			[b]Note:[/b] Only effective if [member physics/3d/physics_engine] is set to [code]DEFAULT[/code] or [code]Bullet[/code], [i]not[/i] [code]GodotPhysics[/code].
+		</member>
 		<member name="physics/common/enable_object_picking" type="bool" setter="" getter="" default="true">
 			Enables [member Viewport.physics_object_picking] on the root viewport.
 		</member>
diff --git a/modules/bullet/shape_bullet.cpp b/modules/bullet/shape_bullet.cpp
index 55782ae6e5b..6c52d755cdc 100644
--- a/modules/bullet/shape_bullet.cpp
+++ b/modules/bullet/shape_bullet.cpp
@@ -422,7 +422,7 @@ void ConcavePolygonShapeBullet::setup(PoolVector<Vector3> p_faces) {
 
 		meshShape = bulletnew(btBvhTriangleMeshShape(shapeInterface, useQuantizedAabbCompression));
 
-		if (GLOBAL_DEF("physics/3d/smooth_trimesh_collision", false)) {
+		if (GLOBAL_GET("physics/3d/smooth_trimesh_collision")) {
 			btTriangleInfoMap *triangleInfoMap = new btTriangleInfoMap();
 			btGenerateInternalEdgeInfo(meshShape, triangleInfoMap);
 		}