Use static collider for air navigation reference instead of mesh

project.godot

@@ -211,6 +211,7 @@ locale/translations=PackedStringArray("res://assets/translations/match.en.transl
 3d_physics/layer_1="Terrain"
 3d_physics/layer_2="TerrainObjects"
 3d_physics/layer_3="AirObjects"
+3d_physics/layer_4="Air"
 
 [navigation]
 

source/match/AirNavigation.gd

@@ -4,7 +4,7 @@ extends Node3D
 @onready var navigation_map_rid = NavigationServer3D.map_create()
 
 @onready var _navigation_region = find_child("NavigationRegion3D")
-@onready var _reference_mesh = find_child("ReferenceMesh")
+@onready var _reference_static_collider_shape = find_child("CollisionShape3D")
 
 
 func _ready():
@@ -16,18 +16,19 @@ func _ready():
 	NavigationServer3D.region_set_map(_navigation_region.get_region_rid(), navigation_map_rid)
 	NavigationServer3D.map_force_update(navigation_map_rid)
 	NavigationServer3D.map_set_active(navigation_map_rid, true)
-	_reference_mesh.global_transform.origin.y = Constants.Match.Air.Y
+	_reference_static_collider_shape.global_transform.origin.y = Constants.Match.Air.Y
 
 
 func bake(map):
 	assert(
 		_navigation_region.navigation_mesh.get_polygon_count() == 0,
 		"bake() should be called exactly once - during runtime"
 	)
-	var plane_mesh = PlaneMesh.new()
-	plane_mesh.size = map.size
-	plane_mesh.center_offset = Vector3(map.size.x, 0, map.size.y) / 2.0
-	_reference_mesh.mesh = plane_mesh
+	var shape = BoxShape3D.new()
+	shape.size = Vector3(map.size.x, 0, map.size.y)
+	_reference_static_collider_shape.shape = shape
+	_reference_static_collider_shape.global_transform.origin.x = map.size.x / 2.0
+	_reference_static_collider_shape.global_transform.origin.z = map.size.y / 2.0
 	_navigation_region.bake_navigation_mesh(false)
 
 

source/match/Match.tscn

@@ -84,7 +84,9 @@ flip_faces = true
 size = Vector2(2, 2)
 
 [sub_resource type="NavigationMesh" id="NavigationMesh_8emvl"]
-geometry_source_geometry_mode = 2
+geometry_parsed_geometry_type = 1
+geometry_collision_mask = 4278190088
+geometry_source_geometry_mode = 1
 geometry_source_group_name = &"air_navigation_input"
 cell_size = 0.4
 cell_height = 0.4
@@ -220,9 +222,14 @@ script = ExtResource("10_1wfp1")
 [node name="Air" type="Node3D" parent="Navigation"]
 script = ExtResource("16_ravsv")
 
-[node name="ReferenceMesh" type="MeshInstance3D" parent="Navigation/Air" groups=["air_navigation_input"]]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.5, 0)
+[node name="ReferenceStaticCollider" type="StaticBody3D" parent="Navigation/Air" groups=["air_navigation_input"]]
 visible = false
+collision_layer = 8
+collision_mask = 0
+input_ray_pickable = false
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="Navigation/Air/ReferenceStaticCollider"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.5, 0)
 
 [node name="NavigationRegion3D" type="NavigationRegion3D" parent="Navigation/Air"]
 navigation_mesh = SubResource("NavigationMesh_8emvl")