Blank terrain plane mesh generated

godot/ProceduralGeneration/Materials/terrain.tres

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+[gd_resource type="StandardMaterial3D" format=3 uid="uid://bvyxpk6nlcaol"]
+
+[resource]
+albedo_color = Color(0.45098, 1, 0.25098, 1)

godot/ProceduralGeneration/TerrainGeneration.gd

@@ -0,0 +1,31 @@
+class_name TerrainGeneration
+extends Node
+
+var mesh : MeshInstance3D
+var size_depth : int = 100
+var size_width : int = 100
+var mesh_res : int = 2
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	generate()
+
+func generate():
+	var plane_mesh = PlaneMesh.new()
+	plane_mesh.size = Vector2(size_width, size_depth)
+	plane_mesh.subdivide_depth = size_depth * mesh_res
+	plane_mesh.subdivide_width = size_width * mesh_res
+	plane_mesh.material = preload("res://ProceduralGeneration/Materials/terrain.tres")
+	
+	var surface = SurfaceTool.new()
+
+	surface.create_from(plane_mesh, 0)
+
+	mesh = MeshInstance3D.new()
+	mesh.mesh = surface.commit()
+	mesh.create_trimesh_collision()
+	mesh.cast_shadow = GeometryInstance3D.SHADOW_CASTING_SETTING_OFF
+
+	mesh.add_to_group("NavSource")
+	add_child(mesh)