diff --git a/engine b/engine
index a5adfac..b46b4bd 160000
--- a/engine
+++ b/engine
@@ -1 +1 @@
-Subproject commit a5adfacdfd6dbb52bd5d1438eef90a370976531e
+Subproject commit b46b4bddba6c609307ca198438c60d617e20c752
diff --git a/game/batch.py b/game/batch.py
index 24294b4..d70f451 100644
--- a/game/batch.py
+++ b/game/batch.py
@@ -19,8 +19,10 @@ from engine import (
     buffer, INSTANCE_FLAG_SPAWNED, BATCH_MAX_SIZE, param_type, params_format,
     create_batch, fill_batch, draw_batch, destroy_batch)
 
-_flags_p = POINTER(c_ubyte)
-_mesh_p = POINTER(c_ushort)
+_flags_t = c_ubyte
+_flags_p = POINTER(_flags_t)
+_mesh_t = c_ushort
+_mesh_p = POINTER(_mesh_t)
 
 class Batch:
     __slots__ = ('_batch', 'vertices', 'max_size', 'size',
@@ -36,9 +38,9 @@ class Batch:
         self.vertices = vertices
         self.max_size = max_size
         self.size = 0
-        self.flags = buffer(c_ubyte, max_size)
+        self.flags = buffer(_flags_t, max_size)
         self._flags = _flags_p(self.flags)
-        self.mesh = buffer(c_ushort, max_size)
+        self.mesh = buffer(_mesh_t, max_size)
         self._meshes = _mesh_p(self.mesh)
         if nparams:
             self.param = tuple(map(lambda f: buffer(param_type(f), max_size), params_decls.values()))
diff --git a/game/obj2rkar.py b/game/obj2rkar.py
index e95798f..433b31c 100644
--- a/game/obj2rkar.py
+++ b/game/obj2rkar.py
@@ -195,7 +195,7 @@ class ObjArchive(Archive):
 
         vertices = []
         indices = []
-        models = {}
+        meshes = {}
         for name, mesh in sorted(objects.items()):
             offset = len(indices)
             assert offset < 65536
@@ -213,7 +213,7 @@ class ObjArchive(Archive):
             assert count < 65536
             vertices.extend(mesh_vertices)
             indices.extend(mesh_indices)
-            models[name] = (offset, count)
+            meshes[name] = (offset, count)
 
         name = str(objpath.stem)
         assert name not in self.vertices_db.keys()
@@ -226,9 +226,6 @@ class ObjArchive(Archive):
             n = (pack_10(_nz) << 20) | (pack_10(_ny) << 10) | pack_10(_nx)
             t = ((_tl & 1023) << 20) | (pack_u10(_t) << 10) | pack_u10(_s)
             return struct.pack('fffII', _px, _py, _pz, n, t)
-        meshes = {}
-        for mesh_name, (offset, count) in sorted(models.items()):
-            meshes[mesh_name] = offset | (count << 16)
         self.vertices_db[name] = VerticesData(name,
             array('B', b''.join(starmap(pack_vertex, vertices))),
             array('H', indices),
diff --git a/game/resources.py b/game/resources.py
index 0a8e26d..6ab8cfe 100644
--- a/game/resources.py
+++ b/game/resources.py
@@ -13,6 +13,7 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from itertools import chain
 import struct
 from array import array
 from pathlib import Path
@@ -147,7 +148,7 @@ class VerticesData:
         self.name = name
         self.vertices = vertices
         self.indices = indices
-        self.meshes = array('I', meshes.values())
+        self.meshes = meshes.values()
         self.meshes_db = dict(zip(meshes.keys(), range(len(meshes))))
 
     def __iter__(self):
@@ -155,7 +156,7 @@ class VerticesData:
         yield len(self.vertices) // VERTEX_SIZE
         yield self.vertices
         yield self.indices
-        yield self.meshes
+        yield array('I', chain.from_iterable(self.meshes))
 
     def get_mesh(self, name):
         return self.meshes_db[name]
@@ -167,19 +168,20 @@ class VerticesData:
         nvertices, nindices, nmeshes = _read_struct(file, 'III')
         vertices = _read_array(file, 'B', nvertices * VERTEX_SIZE)
         indices = _read_array(file, 'H', nindices)
-        meshes = _read_array(file, 'I', nmeshes)
         names = [_read_string(file) for _ in range(nmeshes)]
+        meshes = [_read_struct(file, 'II') for _ in range(nmeshes)]
         return cls(name, vertices, indices, dict(zip(names, meshes)))
 
     def to_archive(self, file):
         _write_magic(file, b'VERT')
         _write_string(file, self.name)
-        _write_struct(file, 'III', len(self.vertices) // VERTEX_SIZE, len(self.indices), len(self.meshes))
+        _write_struct(file, 'III', len(self.vertices) // VERTEX_SIZE, len(self.indices), len(self.meshes_db))
         _write_array(file, self.vertices)
         _write_array(file, self.indices)
-        _write_array(file, self.meshes)
         for name in self.meshes_db.keys():
             _write_string(file, name)
+        for mesh in self.meshes:
+            _write_struct(file, 'II', *mesh)
 
 class Archive:
     __slots__ = 'textures_db', 'vertices_db'