完善客户端功能并同步差距文档

extension/src/metin2_model.cpp

@@ -265,6 +265,7 @@ void Metin2Model::_set_lod(int n) {
 	if (mi->get_mesh().is_valid() && material_mode != String("standard")) {
 		lod_prev_mi = memnew(MeshInstance3D);
 		lod_prev_mi->set_name("LodGhost");
+		lod_prev_mi->set_layer_mask(1u << 1);
 		lod_prev_mi->set_mesh(mi->get_mesh());
 		add_child(lod_prev_mi);
 		lod_prev_mi->set_transform(mi->get_transform());
@@ -457,6 +458,7 @@ void Metin2Model::reload() {
 	if (mesh->get_surface_count() > 0) {
 		mi = memnew(MeshInstance3D);
 		mi->set_name("MeshInstance3D");
+		mi->set_layer_mask(1u << 1); // CharacterLight visibility layer.
 		mi->set_mesh(mesh);
 		add_child(mi);
 		mi->set_owner(get_owner() ? get_owner() : this);
@@ -722,6 +724,7 @@ void Metin2Model::_load_attach(const String &gr2_rel, const String &bone_name,
 
 	slot_mi = memnew(MeshInstance3D);
 	slot_mi->set_name(node_name);
+	slot_mi->set_layer_mask(1u << 1); // equipment follows the character light.
 	slot_mi->set_mesh(wmesh);
 	add_child(slot_mi);