diff --git a/SCsub b/SCsub
index fdc3275..8a0bac8 100644
--- a/SCsub
+++ b/SCsub
@@ -10,6 +10,10 @@ if os.path.isdir('../mesh_data_resource'):
 if os.path.isdir('../texture_packer'):
     module_env.Append(CPPDEFINES=['TEXTURE_PACKER_PRESENT'])
 
+if os.path.isdir('../terraman'):
+    module_env.Append(CPPDEFINES=['TERRAMAN_PRESENT'])
+
+#ifdef 
 sources = [
 
     "register_types.cpp",
@@ -32,6 +36,8 @@ sources = [
     "singleton/prop_utils.cpp",
 
     "editor/prop_editor_plugin.cpp",
+
+    "prop_mesher.cpp",
 ]
 
 if ARGUMENTS.get('custom_modules_shared', 'no') == 'yes':
diff --git a/prop_mesher.cpp b/prop_mesher.cpp
new file mode 100644
index 0000000..b983f7e
--- /dev/null
+++ b/prop_mesher.cpp
@@ -0,0 +1,998 @@
+/*
+Copyright (c) 2019-2021 Péter Magyar
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+#include "prop_mesher.h"
+
+const String PropMesher::BINDING_STRING_BUILD_FLAGS = "Use Isolevel,Use Lighting,Use AO,Use RAO,Generate AO,Generate RAO,Bake Lights,Create Collider,Create Lods";
+
+bool PropMesher::Vertex::operator==(const Vertex &p_vertex) const {
+
+	if (vertex != p_vertex.vertex)
+		return false;
+
+	if (uv != p_vertex.uv)
+		return false;
+
+	if (uv2 != p_vertex.uv2)
+		return false;
+
+	if (normal != p_vertex.normal)
+		return false;
+
+	if (binormal != p_vertex.binormal)
+		return false;
+
+	if (color != p_vertex.color)
+		return false;
+
+	if (bones.size() != p_vertex.bones.size())
+		return false;
+
+	for (int i = 0; i < bones.size(); i++) {
+		if (bones[i] != p_vertex.bones[i])
+			return false;
+	}
+
+	for (int i = 0; i < weights.size(); i++) {
+		if (weights[i] != p_vertex.weights[i])
+			return false;
+	}
+
+	return true;
+}
+
+uint32_t PropMesher::VertexHasher::hash(const Vertex &p_vtx) {
+
+	uint32_t h = hash_djb2_buffer((const uint8_t *)&p_vtx.vertex, sizeof(real_t) * 3);
+	h = hash_djb2_buffer((const uint8_t *)&p_vtx.normal, sizeof(real_t) * 3, h);
+	h = hash_djb2_buffer((const uint8_t *)&p_vtx.binormal, sizeof(real_t) * 3, h);
+	h = hash_djb2_buffer((const uint8_t *)&p_vtx.tangent, sizeof(real_t) * 3, h);
+	h = hash_djb2_buffer((const uint8_t *)&p_vtx.uv, sizeof(real_t) * 2, h);
+	h = hash_djb2_buffer((const uint8_t *)&p_vtx.uv2, sizeof(real_t) * 2, h);
+	h = hash_djb2_buffer((const uint8_t *)&p_vtx.color, sizeof(real_t) * 4, h);
+	h = hash_djb2_buffer((const uint8_t *)p_vtx.bones.ptr(), p_vtx.bones.size() * sizeof(int), h);
+	h = hash_djb2_buffer((const uint8_t *)p_vtx.weights.ptr(), p_vtx.weights.size() * sizeof(float), h);
+	return h;
+}
+
+int PropMesher::get_channel_index_type() const {
+	return _channel_index_type;
+}
+void PropMesher::set_channel_index_type(const int value) {
+	_channel_index_type = value;
+}
+
+int PropMesher::get_channel_index_isolevel() const {
+	return _channel_index_isolevel;
+}
+void PropMesher::set_channel_index_isolevel(const int value) {
+	_channel_index_isolevel = value;
+}
+
+int PropMesher::get_mesher_index() const {
+	return _mesher_index;
+}
+void PropMesher::set_mesher_index(const int value) {
+	_mesher_index = value;
+}
+
+int PropMesher::get_format() const {
+	return _format;
+}
+void PropMesher::set_format(const int value) {
+	_format = value;
+}
+
+int PropMesher::get_texture_scale() const {
+	return _texture_scale;
+}
+void PropMesher::set_texture_scale(const int value) {
+	_texture_scale = value;
+}
+
+Ref<Material> PropMesher::get_material() {
+	return _material;
+}
+void PropMesher::set_material(const Ref<Material> &material) {
+	_material = material;
+}
+
+float PropMesher::get_ao_strength() const {
+	return _ao_strength;
+}
+void PropMesher::set_ao_strength(float value) {
+	_ao_strength = value;
+}
+
+float PropMesher::get_base_light_value() const {
+	return _base_light_value;
+}
+void PropMesher::set_base_light_value(float value) {
+	_base_light_value = value;
+}
+
+float PropMesher::get_voxel_scale() const {
+	return _voxel_scale;
+}
+void PropMesher::set_voxel_scale(const float voxel_scale) {
+	_voxel_scale = voxel_scale;
+}
+
+Rect2 PropMesher::get_uv_margin() const {
+	return _uv_margin;
+}
+void PropMesher::set_uv_margin(const Rect2 margin) {
+	_uv_margin = margin;
+}
+
+_FORCE_INLINE_ int PropMesher::get_build_flags() const {
+	return _build_flags;
+}
+_FORCE_INLINE_ void PropMesher::set_build_flags(const int flags) {
+	_build_flags = flags;
+
+	if ((_build_flags & PropMesher::BUILD_FLAG_USE_LIGHTING) != 0) {
+		_format |= VisualServer::ARRAY_FORMAT_COLOR;
+	} else {
+		_format ^= VisualServer::ARRAY_FORMAT_COLOR;
+	}
+}
+
+Array PropMesher::build_mesh() {
+	Array a;
+	a.resize(VisualServer::ARRAY_MAX);
+
+	if (_vertices.size() == 0) {
+		//Nothing to do
+		return a;
+	}
+
+	{
+		PoolVector<Vector3> array;
+		array.resize(_vertices.size());
+#if !GODOT4
+		PoolVector<Vector3>::Write w = array.write();
+#endif
+
+		for (int i = 0; i < _vertices.size(); ++i) {
+			array.set(i, _vertices[i].vertex);
+		}
+
+#if !GODOT4
+		w.release();
+#endif
+
+		a[VisualServer::ARRAY_VERTEX] = array;
+	}
+
+	if ((_format & VisualServer::ARRAY_FORMAT_NORMAL) == 0) {
+		generate_normals();
+	}
+
+	{
+		PoolVector<Vector3> array;
+		array.resize(_vertices.size());
+#if !GODOT4
+		PoolVector<Vector3>::Write w = array.write();
+#endif
+
+		for (int i = 0; i < _vertices.size(); ++i) {
+			array.set(i, _vertices[i].normal);
+		}
+
+#if !GODOT4
+		w.release();
+#endif
+		a[VisualServer::ARRAY_NORMAL] = array;
+	}
+
+	if ((_format & VisualServer::ARRAY_FORMAT_COLOR) != 0) {
+		PoolVector<Color> array;
+		array.resize(_vertices.size());
+#if !GODOT4
+		PoolVector<Color>::Write w = array.write();
+#endif
+
+		for (int i = 0; i < _vertices.size(); ++i) {
+			array.set(i, _vertices[i].color);
+		}
+
+#if !GODOT4
+		w.release();
+#endif
+		a[VisualServer::ARRAY_COLOR] = array;
+	}
+
+	if ((_format & VisualServer::ARRAY_FORMAT_TEX_UV) != 0) {
+		PoolVector<Vector2> array;
+		array.resize(_vertices.size());
+#if !GODOT4
+		PoolVector<Vector2>::Write w = array.write();
+#endif
+
+		for (int i = 0; i < _vertices.size(); ++i) {
+			array.set(i, _vertices[i].uv);
+		}
+
+#if !GODOT4
+		w.release();
+#endif
+
+		a[VisualServer::ARRAY_TEX_UV] = array;
+	}
+
+	if ((_format & VisualServer::ARRAY_FORMAT_TEX_UV2) != 0) {
+		PoolVector<Vector2> array;
+		array.resize(_vertices.size());
+#if !GODOT4
+		PoolVector<Vector2>::Write w = array.write();
+#endif
+
+		for (int i = 0; i < _vertices.size(); ++i) {
+			array.set(i, _vertices[i].uv2);
+		}
+
+#if !GODOT4
+		w.release();
+#endif
+		a[VisualServer::ARRAY_TEX_UV2] = array;
+	}
+
+	if (_indices.size() > 0) {
+		PoolVector<int> array;
+		array.resize(_indices.size());
+#if !GODOT4
+		PoolVector<int>::Write w = array.write();
+#endif
+
+		for (int i = 0; i < _indices.size(); ++i) {
+			array.set(i, _indices[i]);
+		}
+
+#if !GODOT4
+		w.release();
+#endif
+		a[VisualServer::ARRAY_INDEX] = array;
+	}
+
+	return a;
+}
+
+void PropMesher::build_mesh_into(RID mesh) {
+	ERR_FAIL_COND(mesh == RID());
+
+	VS::get_singleton()->mesh_clear(mesh);
+
+	if (_vertices.size() == 0) {
+		//Nothing to do
+		return;
+	}
+
+	Array arr = build_mesh();
+
+	VS::get_singleton()->mesh_add_surface_from_arrays(mesh, VisualServer::PRIMITIVE_TRIANGLES, arr);
+
+	if (_material.is_valid())
+		VS::get_singleton()->mesh_surface_set_material(mesh, 0, _material->get_rid());
+}
+
+void PropMesher::generate_normals(bool p_flip) {
+
+	_format = _format | VisualServer::ARRAY_FORMAT_NORMAL;
+
+	for (int i = 0; i < _indices.size(); i += 3) {
+		int i0 = _indices[i];
+		int i1 = _indices[i + 1];
+		int i2 = _indices[i + 2];
+
+		ERR_FAIL_INDEX(i0, _vertices.size());
+		ERR_FAIL_INDEX(i1, _vertices.size());
+		ERR_FAIL_INDEX(i2, _vertices.size());
+
+		Vertex v0 = _vertices.get(i0);
+		Vertex v1 = _vertices.get(i1);
+		Vertex v2 = _vertices.get(i2);
+
+		Vector3 normal;
+		if (!p_flip)
+			normal = Plane(v0.vertex, v1.vertex, v2.vertex).normal;
+		else
+			normal = Plane(v2.vertex, v1.vertex, v0.vertex).normal;
+
+		v0.normal = normal;
+		v1.normal = normal;
+		v2.normal = normal;
+
+		_vertices.set(i0, v0);
+		_vertices.set(i1, v1);
+		_vertices.set(i2, v2);
+	}
+}
+
+void PropMesher::remove_doubles() {
+	if (_vertices.size() == 0)
+		return;
+
+	//print_error("before " + String::num(_vertices.size()));
+
+	for (int i = 0; i < _vertices.size(); ++i) {
+		Vertex vert = _vertices[i];
+		PoolVector<int> indices;
+
+		for (int j = i + 1; j < _vertices.size(); ++j) {
+			if (_vertices[j] == vert) {
+				indices.push_back(j);
+			}
+		}
+
+		for (int j = 0; j < indices.size(); ++j) {
+			int index = indices[j];
+
+			_vertices.remove(index);
+
+			//make all indices that were bigger than the one we replaced one lower
+			for (int k = 0; k < _indices.size(); ++k) {
+				int indx = _indices[k];
+
+				if (indx == index) {
+					_indices.set(k, i);
+				} else if (indx > index) {
+					_indices.set(k, --indx);
+				}
+			}
+
+			for (int k = j + 1; k < indices.size(); ++k) {
+				int val = indices[k];
+
+				if (val > index) {
+					indices.set(k, --val);
+				}
+			}
+		}
+	}
+
+	//print_error("after " + String::num(_vertices.size())+ " " + String::num(duration.count()));
+}
+
+//lot faster that normal remove_doubles, but false positives can happen curtesy of hash collisions
+void PropMesher::remove_doubles_hashed() {
+	if (_vertices.size() == 0)
+		return;
+
+	//print_error("before " + String::num(_vertices.size()));
+
+	PoolVector<uint32_t> hashes;
+	hashes.resize(_vertices.size());
+	for (int i = 0; i < _vertices.size(); ++i) {
+		hashes.set(i, VertexHasher::hash(_vertices[i]));
+	}
+
+	for (int i = 0; i < hashes.size(); ++i) {
+		uint32_t hash = hashes[i];
+		PoolVector<int> indices;
+
+		for (int j = i + 1; j < hashes.size(); ++j) {
+			if (hashes[j] == hash) {
+				indices.push_back(j);
+			}
+		}
+
+		for (int j = 0; j < indices.size(); ++j) {
+			int index = indices[j];
+
+			hashes.remove(index);
+			_vertices.remove(index);
+
+			//make all indices that were bigger than the one we replaced one lower
+			for (int k = 0; k < _indices.size(); ++k) {
+				int indx = _indices[k];
+
+				if (indx == index) {
+					_indices.set(k, i);
+				} else if (indx > index) {
+					_indices.set(k, --indx);
+				}
+			}
+
+			for (int k = j + 1; k < indices.size(); ++k) {
+				int val = indices[k];
+
+				if (val > index) {
+					indices.set(k, --val);
+				}
+			}
+		}
+	}
+
+	//print_error("after " + String::num(_vertices.size()) + " " + String::num(duration.count()));
+}
+
+void PropMesher::reset() {
+	_vertices.resize(0);
+	_indices.resize(0);
+
+	_last_color = Color();
+	_last_normal = Vector3();
+	_last_uv = Vector2();
+	_last_uv2 = Vector2();
+	_last_bones.clear();
+	_last_weights.clear();
+	_last_tangent = Plane();
+}
+
+#ifdef MESH_DATA_RESOURCE_PRESENT
+void PropMesher::add_mesh_data_resource(Ref<MeshDataResource> mesh, const Vector3 position, const Vector3 rotation, const Vector3 scale, const Rect2 uv_rect) {
+	Transform transform = Transform(Basis(rotation).scaled(scale), position);
+
+	add_mesh_data_resource_transform(mesh, transform, uv_rect);
+}
+
+void PropMesher::add_mesh_data_resource_transform(Ref<MeshDataResource> mesh, const Transform transform, const Rect2 uv_rect) {
+	if (mesh->get_array().size() == 0)
+		return;
+
+	const Array &arr = mesh->get_array();
+
+	PoolVector3Array vertices = arr[Mesh::ARRAY_VERTEX];
+	PoolVector3Array normals = arr[Mesh::ARRAY_NORMAL];
+	PoolVector2Array uvs = arr[Mesh::ARRAY_TEX_UV];
+	PoolColorArray colors = arr[Mesh::ARRAY_COLOR];
+	PoolIntArray indices = arr[Mesh::ARRAY_INDEX];
+
+	if (vertices.size() == 0)
+		return;
+
+	int orig_vert_size = _vertices.size();
+
+	for (int i = 0; i < vertices.size(); ++i) {
+		if (normals.size() > 0)
+			add_normal(transform.basis.xform(normals[i]));
+
+		if (normals.size() > 0) {
+			Vector2 uv = uvs[i];
+
+			uv.x = uv_rect.size.width * uv.x + uv_rect.position.x;
+			uv.y = uv_rect.size.height * uv.y + uv_rect.position.y;
+
+			add_uv(uv);
+		}
+
+		if (colors.size() > 0)
+			add_color(colors[i]);
+
+		add_vertex(transform.xform(vertices[i]));
+	}
+
+	int orig_indices_count = _indices.size();
+	_indices.resize(_indices.size() + indices.size());
+
+	for (int i = 0; i < indices.size(); ++i) {
+		_indices.set(orig_indices_count + i, orig_vert_size + indices[i]);
+	}
+}
+
+void PropMesher::add_mesh_data_resource_transform_colored(Ref<MeshDataResource> mesh, const Transform transform, const PoolColorArray &colors, const Rect2 uv_rect) {
+	if (mesh->get_array().size() == 0)
+		return;
+
+	const Array &arr = mesh->get_array();
+
+	PoolVector3Array vertices = arr[Mesh::ARRAY_VERTEX];
+	PoolVector3Array normals = arr[Mesh::ARRAY_NORMAL];
+	PoolVector2Array uvs = arr[Mesh::ARRAY_TEX_UV];
+	PoolIntArray indices = arr[Mesh::ARRAY_INDEX];
+
+	if (vertices.size() == 0)
+		return;
+
+	int orig_vert_size = _vertices.size();
+
+	for (int i = 0; i < vertices.size(); ++i) {
+		if (normals.size() > 0)
+			add_normal(transform.basis.xform(normals[i]));
+
+		if (normals.size() > 0) {
+			Vector2 uv = uvs[i];
+
+			uv.x = uv_rect.size.width * uv.x + uv_rect.position.x;
+			uv.y = uv_rect.size.height * uv.y + uv_rect.position.y;
+
+			add_uv(uv);
+		}
+
+		if (colors.size() > 0)
+			add_color(colors[i]);
+
+		add_vertex(transform.xform(vertices[i]));
+	}
+
+	int orig_indices_count = _indices.size();
+	_indices.resize(_indices.size() + indices.size());
+
+	for (int i = 0; i < indices.size(); ++i) {
+		_indices.set(orig_indices_count + i, orig_vert_size + indices[i]);
+	}
+}
+#endif
+
+void PropMesher::add_mesher(const Ref<PropMesher> &mesher) {
+	call("_add_mesher", mesher);
+}
+void PropMesher::_add_mesher(const Ref<PropMesher> &mesher) {
+	int orig_size = _vertices.size();
+
+	_vertices.append_array(mesher->_vertices);
+
+	int s = mesher->_indices.size();
+
+	if (s == 0)
+		return;
+
+	int orig_indices_size = _indices.size();
+
+	_indices.resize(_indices.size() + s);
+	for (int i = 0; i < s; ++i) {
+		_indices.set(i + orig_indices_size, mesher->_indices[i] + orig_size);
+	}
+}
+
+PoolVector<Vector3> PropMesher::build_collider() const {
+	PoolVector<Vector3> face_points;
+
+	if (_vertices.size() == 0)
+		return face_points;
+
+	if (_indices.size() == 0) {
+
+		int len = (_vertices.size() / 4);
+
+		for (int i = 0; i < len; ++i) {
+
+			face_points.push_back(_vertices.get(i * 4).vertex);
+			face_points.push_back(_vertices.get((i * 4) + 2).vertex);
+			face_points.push_back(_vertices.get((i * 4) + 1).vertex);
+
+			face_points.push_back(_vertices.get(i * 4).vertex);
+			face_points.push_back(_vertices.get((i * 4) + 3).vertex);
+			face_points.push_back(_vertices.get((i * 4) + 2).vertex);
+		}
+
+		return face_points;
+	}
+
+	face_points.resize(_indices.size());
+	for (int i = 0; i < face_points.size(); i++) {
+		face_points.set(i, _vertices.get(_indices.get(i)).vertex);
+	}
+
+	return face_points;
+}
+
+#ifdef TERRAMAN_PRESENT
+void PropMesher::bake_lights(MeshInstance *node, Vector<Ref<TerraLight> > &lights) {
+	ERR_FAIL_COND(node == NULL);
+
+	Color darkColor(0, 0, 0, 1);
+
+	for (int v = 0; v < _vertices.size(); ++v) {
+		Vertex vertexv = _vertices.get(v);
+		Vector3 vet = vertexv.vertex;
+		Vector3 vertex = node->to_global(vet);
+
+		//grab normal
+		Vector3 normal = vertexv.normal;
+
+		Vector3 v_lightDiffuse;
+
+		//calculate the lights value
+		for (int i = 0; i < lights.size(); ++i) {
+			Ref<TerraLight> light = lights.get(i);
+
+			Vector3 lightDir = light->get_world_position() - vertex;
+
+			float dist2 = lightDir.dot(lightDir);
+			//inverse sqrt
+			lightDir *= (1.0 / sqrt(dist2));
+
+			float NdotL = normal.dot(lightDir);
+
+			if (NdotL > 1.0) {
+				NdotL = 1.0;
+			} else if (NdotL < 0.0) {
+				NdotL = 0.0;
+			}
+
+			Color cc = light->get_color();
+			Vector3 cv(cc.r, cc.g, cc.b);
+
+			Vector3 value = cv * (NdotL / (1.0 + dist2));
+
+			value *= light->get_size();
+			v_lightDiffuse += value;
+
+			/*
+                    float dist2 = Mathf.Clamp(Vector3.Distance(transformedLights[i], vertices), 0f, 15f);
+                    dist2 /= 35f;
+
+                    Vector3 value = Vector3.one;
+                    value *= ((float) lights[i].Strength) / 255f;
+                    value *= (1 - dist2);
+                    v_lightDiffuse += value;*/
+		}
+
+		Color f = vertexv.color;
+		//Color f = darkColor;
+
+		Vector3 cv2(f.r, f.g, f.b);
+		cv2 += v_lightDiffuse;
+
+		if (cv2.x > 1)
+			cv2.x = 1;
+
+		if (cv2.y > 1)
+			cv2.y = 1;
+
+		if (cv2.y > 1)
+			cv2.y = 1;
+
+		// cv2.x = Mathf.Clamp(cv2.x, 0f, 1f);
+		//cv2.y = Mathf.Clamp(cv2.y, 0f, 1f);
+		// cv2.z = Mathf.Clamp(cv2.z, 0f, 1f);
+
+		f.r = cv2.x;
+		f.g = cv2.y;
+		f.b = cv2.z;
+
+		//f.r = v_lightDiffuse.x;
+		//f.g = v_lightDiffuse.y;
+		//f.b = v_lightDiffuse.z;
+
+		vertexv.color = f;
+		_vertices.set(v, vertexv);
+	}
+
+	//	for (int i = 0; i < _colors->size(); ++i) {
+	//		print_error(_colors->get(i));
+	//	}
+}
+#endif
+
+PoolVector<Vector3> PropMesher::get_vertices() const {
+	PoolVector<Vector3> arr;
+
+	arr.resize(_vertices.size());
+	for (int i = 0; i < _vertices.size(); ++i) {
+		arr.set(i, _vertices.get(i).vertex);
+	}
+
+	return arr;
+}
+
+void PropMesher::set_vertices(const PoolVector<Vector3> &values) {
+	ERR_FAIL_COND(values.size() != _vertices.size());
+
+	for (int i = 0; i < _vertices.size(); ++i) {
+		Vertex v = _vertices[i];
+
+		v.normal = values[i];
+
+		_vertices.set(i, v);
+	}
+}
+
+int PropMesher::get_vertex_count() const {
+	return _vertices.size();
+}
+
+void PropMesher::add_vertex(const Vector3 &vertex) {
+	Vertex vtx;
+	vtx.vertex = vertex;
+	vtx.color = _last_color;
+	vtx.normal = _last_normal;
+	vtx.uv = _last_uv;
+	vtx.uv2 = _last_uv2;
+	// Todo?
+	//	vtx.weights = _last_weights;
+	//	vtx.bones = _last_bones;
+	//	vtx.tangent = _last_tangent.normal;
+	//	vtx.binormal = _last_normal.cross(_last_tangent.normal).normalized() * _last_tangent.d;
+
+	_vertices.push_back(vtx);
+}
+
+Vector3 PropMesher::get_vertex(const int idx) const {
+	return _vertices.get(idx).vertex;
+}
+
+void PropMesher::remove_vertex(const int idx) {
+	_vertices.remove(idx);
+}
+
+PoolVector<Vector3> PropMesher::get_normals() const {
+	PoolVector<Vector3> arr;
+
+	arr.resize(_vertices.size());
+	for (int i = 0; i < _vertices.size(); ++i) {
+		arr.set(i, _vertices.get(i).normal);
+	}
+
+	return arr;
+}
+
+void PropMesher::set_normals(const PoolVector<Vector3> &values) {
+	ERR_FAIL_COND(values.size() != _vertices.size());
+
+	for (int i = 0; i < _vertices.size(); ++i) {
+		Vertex v = _vertices[i];
+
+		v.normal = values[i];
+
+		_vertices.set(i, v);
+	}
+}
+
+void PropMesher::add_normal(const Vector3 &normal) {
+	_last_normal = normal;
+}
+
+Vector3 PropMesher::get_normal(int idx) const {
+	return _vertices.get(idx).normal;
+}
+
+PoolVector<Color> PropMesher::get_colors() const {
+	PoolVector<Color> arr;
+
+	arr.resize(_vertices.size());
+	for (int i = 0; i < _vertices.size(); ++i) {
+		arr.set(i, _vertices.get(i).color);
+	}
+
+	return arr;
+}
+
+void PropMesher::set_colors(const PoolVector<Color> &values) {
+	ERR_FAIL_COND(values.size() != _vertices.size());
+
+	for (int i = 0; i < _vertices.size(); ++i) {
+		Vertex v = _vertices[i];
+
+		v.color = values[i];
+
+		_vertices.set(i, v);
+	}
+}
+
+void PropMesher::add_color(const Color &color) {
+	_last_color = color;
+}
+
+Color PropMesher::get_color(const int idx) const {
+	return _vertices.get(idx).color;
+}
+
+PoolVector<Vector2> PropMesher::get_uvs() const {
+	PoolVector<Vector2> arr;
+
+	arr.resize(_vertices.size());
+	for (int i = 0; i < _vertices.size(); ++i) {
+		arr.set(i, _vertices.get(i).uv);
+	}
+
+	return arr;
+}
+
+void PropMesher::set_uvs(const PoolVector<Vector2> &values) {
+	ERR_FAIL_COND(values.size() != _vertices.size());
+
+	for (int i = 0; i < _vertices.size(); ++i) {
+		Vertex v = _vertices[i];
+
+		v.uv = values[i];
+
+		_vertices.set(i, v);
+	}
+}
+
+void PropMesher::add_uv(const Vector2 &uv) {
+	_last_uv = uv;
+}
+
+Vector2 PropMesher::get_uv(const int idx) const {
+	return _vertices.get(idx).uv;
+}
+
+PoolVector<Vector2> PropMesher::get_uv2s() const {
+	PoolVector<Vector2> arr;
+
+	arr.resize(_vertices.size());
+	for (int i = 0; i < _vertices.size(); ++i) {
+		arr.set(i, _vertices.get(i).uv2);
+	}
+
+	return arr;
+}
+
+void PropMesher::set_uv2s(const PoolVector<Vector2> &values) {
+	ERR_FAIL_COND(values.size() != _vertices.size());
+
+	for (int i = 0; i < _vertices.size(); ++i) {
+		Vertex v = _vertices[i];
+
+		v.uv2 = values[i];
+
+		_vertices.set(i, v);
+	}
+}
+
+void PropMesher::add_uv2(const Vector2 &uv) {
+	_last_uv2 = uv;
+}
+
+Vector2 PropMesher::get_uv2(const int idx) const {
+	return _vertices.get(idx).uv2;
+}
+
+PoolVector<int> PropMesher::get_indices() const {
+	return _indices;
+}
+
+void PropMesher::set_indices(const PoolVector<int> &values) {
+	_indices = values;
+}
+
+int PropMesher::get_indices_count() const {
+	return _indices.size();
+}
+
+void PropMesher::add_indices(const int index) {
+	_indices.push_back(index);
+}
+
+int PropMesher::get_index(const int idx) const {
+	return _indices.get(idx);
+}
+
+void PropMesher::remove_index(const int idx) {
+	_indices.remove(idx);
+}
+
+PropMesher::PropMesher() {
+	_mesher_index = 0;
+	_voxel_scale = 1;
+	_ao_strength = 0.25;
+	_base_light_value = 0.5;
+	_uv_margin = Rect2(0, 0, 1, 1);
+	_format = 0;
+	_channel_index_type = 0;
+	_channel_index_isolevel = 0;
+	_texture_scale = 1;
+
+	_build_flags = PropMesher::BUILD_FLAG_CREATE_COLLIDER | PropMesher::BUILD_FLAG_CREATE_LODS;
+
+	_format = VisualServer::ARRAY_FORMAT_NORMAL | VisualServer::ARRAY_FORMAT_TEX_UV;
+}
+
+PropMesher::~PropMesher() {
+}
+
+void PropMesher::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("get_channel_index_type"), &PropMesher::get_channel_index_type);
+	ClassDB::bind_method(D_METHOD("set_channel_index_type", "value"), &PropMesher::set_channel_index_type);
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "channel_index_type"), "set_channel_index_type", "get_channel_index_type");
+
+	ClassDB::bind_method(D_METHOD("get_channel_index_isolevel"), &PropMesher::get_channel_index_isolevel);
+	ClassDB::bind_method(D_METHOD("set_channel_index_isolevel", "value"), &PropMesher::set_channel_index_isolevel);
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "channel_index_isolevel"), "set_channel_index_isolevel", "get_channel_index_isolevel");
+
+	ClassDB::bind_method(D_METHOD("get_mesher_index"), &PropMesher::get_mesher_index);
+	ClassDB::bind_method(D_METHOD("set_mesher_index", "value"), &PropMesher::set_mesher_index);
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "mesher_index"), "set_mesher_index", "get_mesher_index");
+
+	ClassDB::bind_method(D_METHOD("get_format"), &PropMesher::get_format);
+	ClassDB::bind_method(D_METHOD("set_format", "value"), &PropMesher::set_format);
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "format"), "set_format", "get_format");
+
+	ClassDB::bind_method(D_METHOD("get_texture_scale"), &PropMesher::get_texture_scale);
+	ClassDB::bind_method(D_METHOD("set_texture_scale", "value"), &PropMesher::set_texture_scale);
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "texture_scale"), "set_texture_scale", "get_texture_scale");
+
+	ClassDB::bind_method(D_METHOD("get_material"), &PropMesher::get_material);
+	ClassDB::bind_method(D_METHOD("set_material", "value"), &PropMesher::set_material);
+	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "material", PROPERTY_HINT_RESOURCE_TYPE, "Material"), "set_material", "get_material");
+
+	ClassDB::bind_method(D_METHOD("get_voxel_scale"), &PropMesher::get_voxel_scale);
+	ClassDB::bind_method(D_METHOD("set_voxel_scale", "value"), &PropMesher::set_voxel_scale);
+	ADD_PROPERTY(PropertyInfo(Variant::REAL, "voxel_scale"), "set_voxel_scale", "get_voxel_scale");
+
+	ClassDB::bind_method(D_METHOD("get_ao_strength"), &PropMesher::get_ao_strength);
+	ClassDB::bind_method(D_METHOD("set_ao_strength", "value"), &PropMesher::set_ao_strength);
+	ADD_PROPERTY(PropertyInfo(Variant::REAL, "ao_strength"), "set_ao_strength", "get_ao_strength");
+
+	ClassDB::bind_method(D_METHOD("get_base_light_value"), &PropMesher::get_base_light_value);
+	ClassDB::bind_method(D_METHOD("set_base_light_value", "value"), &PropMesher::set_base_light_value);
+	ADD_PROPERTY(PropertyInfo(Variant::REAL, "base_light_value"), "set_base_light_value", "get_base_light_value");
+
+	ClassDB::bind_method(D_METHOD("get_uv_margin"), &PropMesher::get_uv_margin);
+	ClassDB::bind_method(D_METHOD("set_uv_margin", "value"), &PropMesher::set_uv_margin);
+	ADD_PROPERTY(PropertyInfo(Variant::RECT2, "uv_margin"), "set_uv_margin", "get_uv_margin");
+
+	ClassDB::bind_method(D_METHOD("get_build_flags"), &PropMesher::get_build_flags);
+	ClassDB::bind_method(D_METHOD("set_build_flags", "value"), &PropMesher::set_build_flags);
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "build_flags", PROPERTY_HINT_FLAGS, PropMesher::BINDING_STRING_BUILD_FLAGS), "set_build_flags", "get_build_flags");
+
+#ifdef MESH_DATA_RESOURCE_PRESENT
+	ClassDB::bind_method(D_METHOD("add_mesh_data_resource", "mesh", "position", "rotation", "scale", "uv_rect"), &PropMesher::add_mesh_data_resource, DEFVAL(Rect2(0, 0, 1, 1)), DEFVAL(Vector3(1.0, 1.0, 1.0)), DEFVAL(Vector3()), DEFVAL(Vector3()));
+	ClassDB::bind_method(D_METHOD("add_mesh_data_resource_transform", "mesh", "transform", "uv_rect"), &PropMesher::add_mesh_data_resource_transform, DEFVAL(Rect2(0, 0, 1, 1)));
+	ClassDB::bind_method(D_METHOD("add_mesh_data_resource_transform_colored", "mesh", "transform", "colors", "uv_rect"), &PropMesher::add_mesh_data_resource_transform_colored, DEFVAL(Rect2(0, 0, 1, 1)));
+#endif
+
+	BIND_VMETHOD(MethodInfo("_add_mesher", PropertyInfo(Variant::OBJECT, "mesher", PROPERTY_HINT_RESOURCE_TYPE, "PropMesher")));
+	ClassDB::bind_method(D_METHOD("add_mesher", "mesher"), &PropMesher::add_mesher);
+	ClassDB::bind_method(D_METHOD("_add_mesher", "mesher"), &PropMesher::_add_mesher);
+
+	ClassDB::bind_method(D_METHOD("get_vertices"), &PropMesher::get_vertices);
+	ClassDB::bind_method(D_METHOD("set_vertices", "values"), &PropMesher::set_vertices);
+	ClassDB::bind_method(D_METHOD("get_vertex_count"), &PropMesher::get_vertex_count);
+	ClassDB::bind_method(D_METHOD("get_vertex", "idx"), &PropMesher::get_vertex);
+	ClassDB::bind_method(D_METHOD("remove_vertex", "idx"), &PropMesher::remove_vertex);
+	ClassDB::bind_method(D_METHOD("add_vertex", "vertex"), &PropMesher::add_vertex);
+
+	ClassDB::bind_method(D_METHOD("get_normals"), &PropMesher::get_normals);
+	ClassDB::bind_method(D_METHOD("set_normals", "values"), &PropMesher::set_normals);
+	ClassDB::bind_method(D_METHOD("get_normal", "idx"), &PropMesher::get_normal);
+	ClassDB::bind_method(D_METHOD("add_normal", "normal"), &PropMesher::add_normal);
+
+	ClassDB::bind_method(D_METHOD("get_colors"), &PropMesher::get_colors);
+	ClassDB::bind_method(D_METHOD("set_colors", "values"), &PropMesher::set_colors);
+	ClassDB::bind_method(D_METHOD("get_color", "idx"), &PropMesher::get_color);
+	ClassDB::bind_method(D_METHOD("add_color", "color"), &PropMesher::add_color);
+
+	ClassDB::bind_method(D_METHOD("get_uvs"), &PropMesher::get_uvs);
+	ClassDB::bind_method(D_METHOD("set_uvs", "values"), &PropMesher::set_uvs);
+	ClassDB::bind_method(D_METHOD("get_uv", "idx"), &PropMesher::get_uv);
+	ClassDB::bind_method(D_METHOD("add_uv", "uv"), &PropMesher::add_uv);
+
+	ClassDB::bind_method(D_METHOD("get_uv2s"), &PropMesher::get_uv2s);
+	ClassDB::bind_method(D_METHOD("set_uv2s", "values"), &PropMesher::set_uv2s);
+	ClassDB::bind_method(D_METHOD("get_uv2", "idx"), &PropMesher::get_uv2);
+	ClassDB::bind_method(D_METHOD("add_uv2", "uv"), &PropMesher::add_uv2);
+
+	ClassDB::bind_method(D_METHOD("get_indices"), &PropMesher::get_indices);
+	ClassDB::bind_method(D_METHOD("set_indices", "values"), &PropMesher::set_indices);
+	ClassDB::bind_method(D_METHOD("get_indices_count"), &PropMesher::get_indices_count);
+	ClassDB::bind_method(D_METHOD("get_index", "idx"), &PropMesher::get_index);
+	ClassDB::bind_method(D_METHOD("remove_index", "idx"), &PropMesher::remove_index);
+	ClassDB::bind_method(D_METHOD("add_indices", "indice"), &PropMesher::add_indices);
+
+	ClassDB::bind_method(D_METHOD("reset"), &PropMesher::reset);
+
+	//ClassDB::bind_method(D_METHOD("calculate_vertex_ambient_occlusion", "meshinstance_path", "radius", "intensity", "sampleCount"), &PropMesher::calculate_vertex_ambient_occlusion_path);
+
+	ClassDB::bind_method(D_METHOD("build_mesh"), &PropMesher::build_mesh);
+	ClassDB::bind_method(D_METHOD("build_mesh_into", "mesh_rid"), &PropMesher::build_mesh_into);
+	ClassDB::bind_method(D_METHOD("build_collider"), &PropMesher::build_collider);
+
+	ClassDB::bind_method(D_METHOD("generate_normals", "flip"), &PropMesher::generate_normals, DEFVAL(false));
+
+	ClassDB::bind_method(D_METHOD("remove_doubles"), &PropMesher::remove_doubles);
+	ClassDB::bind_method(D_METHOD("remove_doubles_hashed"), &PropMesher::remove_doubles_hashed);
+}
diff --git a/prop_mesher.h b/prop_mesher.h
new file mode 100644
index 0000000..8837459
--- /dev/null
+++ b/prop_mesher.h
@@ -0,0 +1,243 @@
+/*
+Copyright (c) 2019-2021 Péter Magyar
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+#ifndef PROP_MESHER_H
+#define PROP_MESHER_H
+
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/math/color.h"
+#include "core/object/reference.h"
+#include "core/templates/vector.h"
+
+template <class N>
+class Vector;
+template <class N>
+using PoolVector = Vector<N>;
+
+#include "scene/3d/mesh_instance_3d.h"
+
+#else
+#include "core/color.h"
+#include "core/reference.h"
+#include "core/vector.h"
+#include "core/pool_vector.h"
+#include "scene/3d/mesh_instance.h"
+#endif
+
+#include "core/math/rect2.h"
+#include "core/math/vector2.h"
+#include "core/math/vector3.h"
+#include "scene/main/node.h"
+#include "scene/resources/material.h"
+#include "scene/resources/mesh.h"
+
+#ifdef MESH_DATA_RESOURCE_PRESENT
+#include "../mesh_data_resource/mesh_data_resource.h"
+#endif
+
+#ifdef TERRAMAN_PRESENT
+#include "../terraman/data/terra_light.h"
+#endif
+
+class PropMesher : public Reference {
+	GDCLASS(PropMesher, Reference);
+
+public:
+	static const String BINDING_STRING_BUILD_FLAGS;
+
+	const double PI_2 = 3.141592653589793238463 / 2;
+	const double PI = 3.141592653589793238463;
+
+	enum BuildFlags {
+		BUILD_FLAG_USE_ISOLEVEL = 1 << 0,
+		BUILD_FLAG_USE_LIGHTING = 1 << 1,
+		BUILD_FLAG_USE_AO = 1 << 2,
+		BUILD_FLAG_USE_RAO = 1 << 3,
+		BUILD_FLAG_GENERATE_AO = 1 << 4,
+		BUILD_FLAG_AUTO_GENERATE_RAO = 1 << 5,
+		BUILD_FLAG_BAKE_LIGHTS = 1 << 6,
+		BUILD_FLAG_CREATE_COLLIDER = 1 << 7,
+		BUILD_FLAG_CREATE_LODS = 1 << 8,
+	};
+
+	struct Vertex {
+
+		Vector3 vertex;
+		Color color;
+		Vector3 normal; // normal, binormal, tangent
+		Vector3 binormal;
+		Vector3 tangent;
+		Vector2 uv;
+		Vector2 uv2;
+		Vector<int> bones;
+		Vector<float> weights;
+
+		bool operator==(const Vertex &p_vertex) const;
+
+		Vertex() {}
+	};
+
+	struct VertexHasher {
+		static _FORCE_INLINE_ uint32_t hash(const Vertex &p_vtx);
+	};
+
+	struct WeightSort {
+		int index;
+		float weight;
+		bool operator<(const WeightSort &p_right) const {
+			return weight < p_right.weight;
+		}
+	};
+
+public:
+	int get_channel_index_type() const;
+	void set_channel_index_type(const int value);
+
+	int get_channel_index_isolevel() const;
+	void set_channel_index_isolevel(const int value);
+
+	int get_mesher_index() const;
+	void set_mesher_index(const int value);
+
+	int get_format() const;
+	void set_format(const int value);
+
+	int get_texture_scale() const;
+	void set_texture_scale(const int value);
+
+	Ref<Material> get_material();
+	void set_material(const Ref<Material> &material);
+
+	float get_ao_strength() const;
+	void set_ao_strength(const float value);
+
+	float get_base_light_value() const;
+	void set_base_light_value(const float value);
+
+	float get_voxel_scale() const;
+	void set_voxel_scale(const float voxel_scale);
+
+	Rect2 get_uv_margin() const;
+	void set_uv_margin(const Rect2 margin);
+
+	int get_build_flags() const;
+	void set_build_flags(const int flags);
+
+	void reset();
+
+#ifdef MESH_DATA_RESOURCE_PRESENT
+	void add_mesh_data_resource(Ref<MeshDataResource> mesh, const Vector3 position = Vector3(0, 0, 0), const Vector3 rotation = Vector3(0, 0, 0), const Vector3 scale = Vector3(1.0, 1.0, 1.0), const Rect2 uv_rect = Rect2(0, 0, 1, 1));
+	void add_mesh_data_resource_transform(Ref<MeshDataResource> mesh, const Transform transform, const Rect2 uv_rect = Rect2(0, 0, 1, 1));
+	void add_mesh_data_resource_transform_colored(Ref<MeshDataResource> mesh, const Transform transform, const PoolColorArray &colors, const Rect2 uv_rect = Rect2(0, 0, 1, 1));
+#endif
+
+	void add_mesher(const Ref<PropMesher> &mesher);
+	void _add_mesher(const Ref<PropMesher> &mesher);
+
+	PoolVector<Vector3> build_collider() const;
+
+#ifdef TERRAMAN_PRESENT
+	void bake_lights(MeshInstance *node, Vector<Ref<TerraLight> > &lights);
+#endif
+
+	Array build_mesh();
+	void build_mesh_into(RID mesh);
+
+	void generate_normals(bool p_flip = false);
+	void remove_doubles();
+	void remove_doubles_hashed();
+
+	PoolVector<Vector3> get_vertices() const;
+	void set_vertices(const PoolVector<Vector3> &values);
+	int get_vertex_count() const;
+	Vector3 get_vertex(const int idx) const;
+	void remove_vertex(const int idx);
+	void add_vertex(const Vector3 &vertex);
+
+	PoolVector<Vector3> get_normals() const;
+	void set_normals(const PoolVector<Vector3> &values);
+	Vector3 get_normal(const int idx) const;
+	void add_normal(const Vector3 &normal);
+
+	PoolVector<Color> get_colors() const;
+	void set_colors(const PoolVector<Color> &values);
+	Color get_color(const int idx) const;
+	void add_color(const Color &color);
+
+	PoolVector<Vector2> get_uvs() const;
+	void set_uvs(const PoolVector<Vector2> &values);
+	Vector2 get_uv(const int idx) const;
+	void add_uv(const Vector2 &vector);
+
+	PoolVector<Vector2> get_uv2s() const;
+	void set_uv2s(const PoolVector<Vector2> &values);
+	Vector2 get_uv2(const int idx) const;
+	void add_uv2(const Vector2 &vector);
+
+	PoolVector<int> get_indices() const;
+	void set_indices(const PoolVector<int> &values);
+	int get_indices_count() const;
+	int get_index(const int idx) const;
+	void remove_index(const int idx);
+	void add_indices(const int index);
+
+	PropMesher();
+	~PropMesher();
+
+protected:
+	static void _bind_methods();
+
+	int _channel_index_type;
+	int _channel_index_isolevel;
+
+	int _mesher_index;
+
+	int _format;
+
+	int _texture_scale;
+
+	PoolVector<Vertex> _vertices;
+	PoolVector<int> _indices;
+
+	Color _last_color;
+	Vector3 _last_normal;
+	Vector2 _last_uv;
+	Vector2 _last_uv2;
+	Vector<int> _last_bones;
+	Vector<float> _last_weights;
+	Plane _last_tangent;
+
+	Ref<Material> _material;
+
+	float _voxel_scale;
+
+	float _ao_strength;
+	float _base_light_value;
+	Rect2 _uv_margin;
+	int _build_flags;
+};
+
+VARIANT_ENUM_CAST(PropMesher::BuildFlags);
+
+#endif
diff --git a/register_types.cpp b/register_types.cpp
index dff5b09..04b911d 100644
--- a/register_types.cpp
+++ b/register_types.cpp
@@ -50,6 +50,8 @@ SOFTWARE.
 
 #include "./editor/prop_editor_plugin.h"
 
+#include "prop_mesher.h"
+
 static PropUtils *prop_utils = NULL;
 
 void register_props_types() {
@@ -62,6 +64,8 @@ void register_props_types() {
 	ClassDB::register_class<GroundClutter>();
 	ClassDB::register_class<GroundClutterFoliage>();
 
+	ClassDB::register_class<PropMesher>();
+
 	ClassDB::register_class<PropInstance>();
 
 	ClassDB::register_class<PropESSEntity>();