diff --git a/.gitignore b/.gitignore
index 2b2a360..53054ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 compile_commands.json
 build
 cmake-build-debug
+*/bin/*
diff --git a/src/RecastNavMesh.cpp b/src/RecastNavMesh.cpp
index 7a12ebc..aab7be8 100644
--- a/src/RecastNavMesh.cpp
+++ b/src/RecastNavMesh.cpp
@@ -10,9 +10,17 @@ godot::RecastNavMesh::~RecastNavMesh() {
 
 void godot::RecastNavMesh::_bind_methods() {
   ClassDB::bind_method(D_METHOD("clear_vertices"), &RecastNavMesh::clear_vertices);
-  ClassDB::bind_method(D_METHOD("add_vertices", "vertices"), &RecastNavMesh::add_vertices);
+  ClassDB::bind_method(D_METHOD("add_vertices", "vertices", "area_id"), &RecastNavMesh::add_vertices);
   ClassDB::bind_method(D_METHOD("recalculate_navmesh"), &RecastNavMesh::recalculate_navmesh);
   ClassDB::bind_method(D_METHOD("is_calculated"), &RecastNavMesh::is_calculated);
 }
 
+bool godot::RecastNavMesh::add_vertices(const PackedByteArray& vertices, unsigned char area_id) {
+  return false;
+}
 
+bool godot::RecastNavMesh::recalculate_navmesh() {
+
+}
+
+void godot::RecastNavMesh::clear_vertices() {}
diff --git a/src/RecastNavMesh.hpp b/src/RecastNavMesh.hpp
index 41ab166..1c8f3f9 100644
--- a/src/RecastNavMesh.hpp
+++ b/src/RecastNavMesh.hpp
@@ -14,7 +14,7 @@ namespace godot {
       RecastNavMesh();
       ~RecastNavMesh();
       void clear_vertices();
-      bool add_vertices(const PackedByteArray& vertices);
+      bool add_vertices(const PackedByteArray& vertices, unsigned char area_id);
       bool recalculate_navmesh();
       bool is_calculated() { return calculated; }
   };
diff --git a/testscenes/recast_navigation_scenes/.gitattributes b/testscenes/recast_navigation_scenes/.gitattributes
new file mode 100644
index 0000000..8ad74f7
--- /dev/null
+++ b/testscenes/recast_navigation_scenes/.gitattributes
@@ -0,0 +1,2 @@
+# Normalize EOL for all files that Git considers text files.
+* text=auto eol=lf
diff --git a/testscenes/recast_navigation_scenes/.gitignore b/testscenes/recast_navigation_scenes/.gitignore
new file mode 100644
index 0000000..8ef0045
--- /dev/null
+++ b/testscenes/recast_navigation_scenes/.gitignore
@@ -0,0 +1,6 @@
+# Godot 4+ specific ignores
+.godot/
+android/
+bin/
+# core dumps from godot
+*.core
diff --git a/testscenes/recast_navigation_scenes/icon.svg b/testscenes/recast_navigation_scenes/icon.svg
new file mode 100644
index 0000000..3fe4f4a
--- /dev/null
+++ b/testscenes/recast_navigation_scenes/icon.svg
@@ -0,0 +1 @@
+<svg height="128" width="128" xmlns="http://www.w3.org/2000/svg"><rect x="2" y="2" width="124" height="124" rx="14" fill="#363d52" stroke="#212532" stroke-width="4"/><g transform="scale(.101) translate(122 122)"><g fill="#fff"><path d="M105 673v33q407 354 814 0v-33z"/><path d="m105 673 152 14q12 1 15 14l4 67 132 10 8-61q2-11 15-15h162q13 4 15 15l8 61 132-10 4-67q3-13 15-14l152-14V427q30-39 56-81-35-59-83-108-43 20-82 47-40-37-88-64 7-51 8-102-59-28-123-42-26 43-46 89-49-7-98 0-20-46-46-89-64 14-123 42 1 51 8 102-48 27-88 64-39-27-82-47-48 49-83 108 26 42 56 81zm0 33v39c0 276 813 276 814 0v-39l-134 12-5 69q-2 10-14 13l-162 11q-12 0-16-11l-10-65H446l-10 65q-4 11-16 11l-162-11q-12-3-14-13l-5-69z" fill="#478cbf"/><path d="M483 600c0 34 58 34 58 0v-86c0-34-58-34-58 0z"/><circle cx="725" cy="526" r="90"/><circle cx="299" cy="526" r="90"/></g><g fill="#414042"><circle cx="307" cy="532" r="60"/><circle cx="717" cy="532" r="60"/></g></g></svg>
diff --git a/testscenes/recast_navigation_scenes/icon.svg.import b/testscenes/recast_navigation_scenes/icon.svg.import
new file mode 100644
index 0000000..2059d2d
--- /dev/null
+++ b/testscenes/recast_navigation_scenes/icon.svg.import
@@ -0,0 +1,37 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://b0mkd65r311a5"
+path="res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://icon.svg"
+dest_files=["res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false
diff --git a/testscenes/recast_navigation_scenes/project.godot b/testscenes/recast_navigation_scenes/project.godot
new file mode 100644
index 0000000..5b50ead
--- /dev/null
+++ b/testscenes/recast_navigation_scenes/project.godot
@@ -0,0 +1,15 @@
+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="recast_navigation_scenes"
+config/features=PackedStringArray("4.3", "Forward Plus")
+config/icon="res://icon.svg"
diff --git a/testscenes/recast_navigation_scenes/test_1.tscn b/testscenes/recast_navigation_scenes/test_1.tscn
new file mode 100644
index 0000000..6112f56
--- /dev/null
+++ b/testscenes/recast_navigation_scenes/test_1.tscn
@@ -0,0 +1,3 @@
+[gd_scene format=3 uid="uid://cupppmn2gh77n"]
+
+[node name="Node3D" type="Node3D"]