diff --git a/dep/dbmgr b/dep/dbmgr
index 2d884b8..a2768a0 160000
--- a/dep/dbmgr
+++ b/dep/dbmgr
@@ -1 +1 @@
-Subproject commit 2d884b843a057c25159833226a4e2c73443d91eb
+Subproject commit a2768a05d85958cb52de967a1ef2ea20d9bba309
diff --git a/src/common/common.cpp b/src/common/common.cpp
index 82be229..62987f1 100644
--- a/src/common/common.cpp
+++ b/src/common/common.cpp
@@ -40,7 +40,10 @@ std::vector<uint8_t> readFile(const std::string &fn)
 {
     FILE *f = fopen(fn.c_str(), "rb");
     if (!f)
+    {
+        printf("Cannot open file %s\n", fn.c_str());
         throw std::runtime_error("Cannot open file " + fn);
+    }
     fseek(f, 0, SEEK_END);
     auto sz = ftell(f);
     fseek(f, 0, SEEK_SET);
@@ -64,121 +67,141 @@ buffer::buffer()
 }
 
 buffer::buffer(size_t size)
-    : buf(new std::vector<uint8_t>(size))
+    : buf_(new std::vector<uint8_t>(size))
 {
-    this->size = buf->size();
+    size_ = buf_->size();
     skip(0);
 }
 
 buffer::buffer(const std::vector<uint8_t> &buf, uint32_t data_offset)
-    : buf(new std::vector<uint8_t>(buf)), data_offset(data_offset)
+    : buf_(new std::vector<uint8_t>(buf)), data_offset(data_offset)
 {
     skip(0);
-    size = this->buf->size();
+    size_ = buf_->size();
 }
 
 buffer::buffer(buffer &rhs, uint32_t size)
-    : buf(rhs.buf)
+    : buf_(rhs.buf_)
 {
-    index = rhs.index;
+    index_ = rhs.index_;
     data_offset = rhs.data_offset;
     ptr = rhs.ptr;
-    this->size = index + size;
+    size_ = index_ + size;
     rhs.skip(size);
 }
 
 buffer::buffer(buffer &rhs, uint32_t size, uint32_t offset)
-    : buf(rhs.buf)
+    : buf_(rhs.buf_)
 {
-    index = offset;
+    index_ = offset;
     data_offset = offset;
-    ptr = (uint8_t *)buf->data() + index;
-    this->size = index + size;
+    ptr = (uint8_t *)buf_->data() + index_;
+    size_ = index_ + size;
 }
 
 uint32_t buffer::read(void *dst, uint32_t size, bool nothrow) const
 {
-    if (!buf)
+    if (!buf_)
         throw std::logic_error("buffer: not initialized");
-    if (index >= this->size)
+    if (index_ >= size_)
     {
         if (nothrow)
             return 0;
         throw std::logic_error("buffer: out of range");
     }
-    if (index + size > this->size)
+    if (index_ + size > size_)
     {
         if (!nothrow)
             throw std::logic_error("buffer: too much data");
-        size = this->size - index;
+        size = size_ - index_;
     }
-    memcpy(dst, buf->data() + index, size);
+    memcpy(dst, buf_->data() + index_, size);
     skip(size);
     return size;
 }
 
+uint32_t buffer::readfrom(void *dst, uint32_t size, uint32_t offset, bool nothrow) const
+{
+    if (!buf_)
+        throw std::logic_error("buffer: not initialized");
+    if (offset + size > size_)
+    {
+        if (!nothrow)
+            throw std::logic_error("buffer: too much data");
+        size = size_ - offset;
+    }
+    memcpy(dst, buf_->data() + offset, size);
+    return size;
+}
+
 uint32_t buffer::write(const void *src, uint32_t size, bool nothrow)
 {
-    if (!buf)
+    if (!buf_)
     {
-        buf = std::make_shared<std::vector<uint8_t>>(size);
-        this->size = buf->size();
+        buf_ = std::make_shared<std::vector<uint8_t>>(size);
+        size_ = buf_->size();
     }
-    if (index > this->size)
+    if (index_ > size_)
     {
         if (nothrow)
             return 0;
         throw std::logic_error("buffer: out of range");
     }
-    if (index + size > this->size)
+    if (index_ + size > size_)
     {
-        buf->resize(index + size);
-        this->size = buf->size();
+        buf_->resize(index_ + size);
+        size_ = buf_->size();
     }
-    memcpy((uint8_t *)buf->data() + index, src, size);
+    memcpy((uint8_t *)buf_->data() + index_, src, size);
     skip(size);
     return size;
 }
 
 void buffer::skip(int n) const
 {
-    if (!buf)
+    if (!buf_)
         throw std::logic_error("buffer: not initialized");
-    index += n;
+    index_ += n;
     data_offset += n;
-    ptr = (uint8_t *)buf->data() + index;
+    ptr = (uint8_t *)buf_->data() + index_;
 }
 
 void buffer::reset() const
 {
-    index = 0;
+    index_ = 0;
     data_offset = 0;
-    ptr = (uint8_t *)buf->data();
+    ptr = (uint8_t *)buf_->data();
+}
+
+void buffer::seek(uint32_t size) const
+{
+    reset();
+    skip(size);
 }
 
 bool buffer::check(int index) const
 {
-    return this->index == index;
+    return index_ == index;
 }
 
 bool buffer::eof() const
 {
-    return check(this->size);
+    return check(size_);
 }
 
-uint32_t buffer::getIndex() const
+uint32_t buffer::index() const
 {
-    return index;
+    return index_;
 }
 
-uint32_t buffer::getSize() const
+uint32_t buffer::size() const
 {
-    return this->size;
+    return size_;
 }
 
-const std::vector<uint8_t> &buffer::getBuf() const
+const std::vector<uint8_t> &buffer::buf() const
 {
-    if (!buf)
+    if (!buf_)
         throw std::logic_error("buffer: not initialized");
-    return *buf;
+    return *buf_;
 }
diff --git a/src/common/common.h b/src/common/common.h
index 1a8f4de..811cfa5 100644
--- a/src/common/common.h
+++ b/src/common/common.h
@@ -42,26 +42,28 @@ public:
     buffer(buffer &rhs, uint32_t size, uint32_t offset);
 
     uint32_t read(void *dst, uint32_t size, bool nothrow = false) const;
+    uint32_t readfrom(void *dst, uint32_t size, uint32_t offset, bool nothrow = false) const;
     uint32_t write(const void *src, uint32_t size, bool nothrow = false);
     template <typename T>
-    uint32_t write(const T &src, bool nothrow = false)
+    uint32_t write(const T &src)
     {
-        return write(&src, sizeof(src), nothrow);
+        return write(&src, sizeof(src));
     }
 
+    void seek(uint32_t size) const;
     void skip(int n) const;
     bool eof() const;
     bool check(int index) const;
     void reset() const;
 
-    uint32_t getIndex() const;
-    uint32_t getSize() const;
-    const std::vector<uint8_t> &getBuf() const;
+    uint32_t index() const;
+    uint32_t size() const;
+    const std::vector<uint8_t> &buf() const;
 
 private:
-    std::shared_ptr<std::vector<uint8_t>> buf;
-    mutable uint32_t index = 0;
+    std::shared_ptr<std::vector<uint8_t>> buf_;
+    mutable uint32_t index_ = 0;
     mutable uint8_t *ptr = 0;
     mutable uint32_t data_offset = 0;
-    mutable uint32_t size = 0;
+    mutable uint32_t size_ = 0;
 };
diff --git a/src/mod_converter/mod_converter.bat b/src/mod_converter/mod_converter.bat
new file mode 100644
index 0000000..44853dc
--- /dev/null
+++ b/src/mod_converter/mod_converter.bat
@@ -0,0 +1 @@
+python mod_converter.py --dir "h:\\Games\\Epic Games\\Projects\\AIM\\models1\\"
\ No newline at end of file
diff --git a/src/mod_converter/mod_converter.cpp b/src/mod_converter/mod_converter.cpp
index 2458cbd..d69f96a 100644
--- a/src/mod_converter/mod_converter.cpp
+++ b/src/mod_converter/mod_converter.cpp
@@ -16,6 +16,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <algorithm>
 #include <fstream>
 #include <sstream>
 #include <stdio.h>
@@ -27,6 +28,48 @@
 
 using namespace std;
 
+// options
+bool silent = false;
+bool printMaxPolygonBlock = false;
+string filename;
+
+bool parse_cmd(int argc, char *argv[]);
+
+void print(const block &b, const std::string &fn)
+{
+    if (b.type == BlockType::ParticleEmitter)
+        return;
+    
+    auto obj_fn = fn;
+    if (!printMaxPolygonBlock)
+        obj_fn += string(".") + b.name;
+    obj_fn += ".obj";
+    ofstream o(obj_fn);
+    o << "#" << "\n";
+    o << "# A.I.M. Model Converter (ver. " << version() << ")\n";
+    o << "#" << "\n";
+    o << "\n";
+    int p1 = fn.rfind("\\");
+    int p2 = fn.rfind("/");
+    auto mtl = fn.substr(std::max(p1, p2) + 1);
+    if (!printMaxPolygonBlock)
+        mtl += string(".") + b.name;
+    o << "mtllib " << mtl << ".mtl\n";
+    o << "\n";
+    o << b.printObj(mtl);
+
+    auto mtl_fn = fn;
+    if (!printMaxPolygonBlock)
+        mtl_fn += string(".") + b.name;
+    mtl_fn += ".mtl";
+    ofstream m(mtl_fn);
+    m << "#" << "\n";
+    m << "# A.I.M. Model Converter (ver. " << version() << ")\n";
+    m << "#" << "\n";
+    m << "\n";
+    m << b.printMtl(mtl);
+}
+
 void convert_model(string fn)
 {
     buffer b(readFile(fn));
@@ -36,26 +79,47 @@ void convert_model(string fn)
     if (!b.eof())
     {
         stringstream ss;
-        ss << hex << b.getIndex() << " != " << hex << b.getSize();
+        ss << hex << b.index() << " != " << hex << b.size();
         throw std::logic_error(ss.str());
     }
 
-    m.writeObj(fn);
+    // write obj and mtl
+    if (printMaxPolygonBlock)
+    {
+        int max = 0;
+        int maxBlock = -1;
+        for (int i = 0; i < m.blocks.size(); i++)
+        {
+            if (m.blocks[i].n_vertex > max)
+            {
+                max = m.blocks[i].n_vertex;
+                maxBlock = i;
+            }
+        }
+        print(m.blocks[maxBlock], filename);
+    }
+    else
+    {
+        for (auto &f : m.blocks)
+            print(f, filename);
+    }
 }
 
 int main(int argc, char *argv[])
 try
 {
-    if (argc != 2)
+    if (argc < 2 || !parse_cmd(argc, argv))
     {
-        printf("Usage: %s model_file\n", argv[0]);
+        printf("Usage: %s [OPTIONS] model_file\n", argv[0]);
         return 1;
     }
-    convert_model(argv[1]);
+    convert_model(filename);
     return 0;
 }
 catch (std::runtime_error &e)
 {
+    if (silent)
+        return 1;
     string error;
     if (argv[1])
         error += argv[1];
@@ -72,13 +136,42 @@ catch (std::runtime_error &e)
 }
 catch (std::exception &e)
 {
+    if (silent)
+        return 1;
     printf("%s\n", argv[1]);
     printf("error: %s\n", e.what());
     return 1;
 }
 catch (...)
 {
+    if (silent)
+        return 1;
     printf("%s\n", argv[1]);
     printf("error: unknown exception\n");
     return 1;
 }
+
+bool parse_cmd(int argc, char *argv[])
+{
+    for (int i = 1; i < argc; i++)
+    {
+        auto arg = argv[i];
+        if (*arg != '-')
+        {
+            if (i != argc - 1)
+                return false;
+            filename = arg;
+            continue;
+        }
+        switch (arg[1])
+        {
+        case 's':
+            silent = true;
+            break;
+        case 'm':
+            printMaxPolygonBlock = true;
+            break;
+        }
+    }
+    return true;
+}
diff --git a/src/mod_converter/model.cpp b/src/mod_converter/model.cpp
index ac8cbbb..3b7dc6f 100644
--- a/src/mod_converter/model.cpp
+++ b/src/mod_converter/model.cpp
@@ -139,22 +139,28 @@ std::string block::printMtl(const std::string &mtl_name) const
     // d 1.0
     // illum
     s += "\n";
-    s += "map_Ka " + string(tex_mask) + ".tga\n";
-    s += "map_Kd " + string(tex_mask) + ".tga\n";
-    s += "map_Ks " + string(tex_spec) + ".tga\n";
-    s += "map_Ns " + string(tex_spec) + ".tga\n";
+    if (string(tex_mask) != "_DEFAULT_")
+        s += "map_Ka " + string(tex_mask) + ".tga" + "\n";
+    if (string(tex_mask) != "_DEFAULT_")
+        s += "map_Kd " + string(tex_mask) + ".tga" + "\n";
+    if (string(tex_spec) != "_DEFAULT_")
+        s += "map_Ks " + string(tex_spec) + ".tga" + "\n";
+    if (string(tex_spec) != "_DEFAULT_")
+        s += "map_Ns " + string(tex_spec) + ".tga" + "\n";
     s += "\n";
     return s;
 }
 
-std::string block::printObj() const
+std::string block::printObj(const std::string &mtl_name) const
 {
     string s;
-    s += string("o ") + name + "\n";
-    s += string("g ") + name + "\n";
+    // UE does not recognize russian strings in .obj
+    //s += string("o ") + name + "\n";
+    //s += string("g ") + name + "\n";
+    s += "g group1\n";
     s += "s off\n";
     s += "\n";
-    s += "usemtl main\n";
+    s += "usemtl " + mtl_name + "\n";
     s += "\n";
 
     for (auto &v : vertices)
@@ -201,12 +207,12 @@ void block::load(buffer &b)
     READ(b, unk4);
 
     if (size == 0) // critical error!!! cannot survive
-        throw std::runtime_error("model file has bad block size field");
+        throw std::runtime_error("model file has bad block size field (size == 0)");
     
     // data
     buffer data = buffer(b, size);
 
-    // we cannot process this type at the moment    
+    // we cannot process this type at the moment
     if (type == BlockType::ParticleEmitter)
         return;
 
@@ -253,7 +259,7 @@ void block::load(buffer &b)
     {
         // unknown end of block
         auto triangles2 = triangles;
-        triangles2.resize((data.getSize() - data.getIndex()) / sizeof(triangle));
+        triangles2.resize((data.size() - data.index()) / sizeof(triangle));
         for (auto &t : triangles2)
             READ(data, t);
     }
@@ -271,29 +277,3 @@ void model::load(buffer &b)
     for (auto &f : blocks)
         f.load(b);
 }
-
-void model::writeObj(std::string fn)
-{
-    for (auto &f : blocks)
-    {
-        ofstream o(fn + "." + f.name + ".obj");
-        o << "#" << "\n";
-        o << "# A.I.M. Model Converter (ver. " << version() << ")\n";
-        o << "#" << "\n";
-        o << "\n";
-        int p1 = fn.rfind("\\");
-        int p2 = fn.rfind("/");
-        auto mtl = fn.substr(std::max(p1, p2) + 1);
-        mtl += string(".") + f.name;
-        o << "mtllib " << mtl << ".mtl\n";
-        o << "\n";
-        o << f.printObj();
-
-        ofstream m(fn + "." + f.name + ".mtl");
-        m << "#" << "\n";
-        m << "# A.I.M. Model Converter (ver. " << version() << ")\n";
-        m << "#" << "\n";
-        m << "\n";
-        m << f.printMtl(mtl);
-    }
-}
diff --git a/src/mod_converter/model.h b/src/mod_converter/model.h
index e629176..53ae1a7 100644
--- a/src/mod_converter/model.h
+++ b/src/mod_converter/model.h
@@ -214,7 +214,7 @@ struct block
 
     void load(buffer &b);
     std::string printMtl(const std::string &mtl_name) const;
-    std::string printObj() const;
+    std::string printObj(const std::string &mtl_name) const;
 };
 
 struct model
@@ -224,5 +224,4 @@ struct model
     std::vector<block> blocks;
 
     void load(buffer &b);
-    void writeObj(std::string fn);
 };
diff --git a/src/obj_extractor/obj_extractor.bat b/src/obj_extractor/obj_extractor.bat
new file mode 100644
index 0000000..5d95771
--- /dev/null
+++ b/src/obj_extractor/obj_extractor.bat
@@ -0,0 +1 @@
+python obj_extractor.py --db "h:\Games\Epic Games\Projects\Polygon4\Mods\db.sqlite" --dir "h:\Games\AIM\data\maps.pak.dir"
\ No newline at end of file
diff --git a/src/obj_extractor/obj_extractor.cpp b/src/obj_extractor/obj_extractor.cpp
index a00b9ff..1817e8c 100644
--- a/src/obj_extractor/obj_extractor.cpp
+++ b/src/obj_extractor/obj_extractor.cpp
@@ -55,7 +55,7 @@ struct storage
         if (!b.eof())
         {
             stringstream ss;
-            ss << hex << b.getIndex() << " != " << hex << b.getSize();
+            ss << hex << b.index() << " != " << hex << b.size();
             throw std::logic_error(ss.str());
         }
     }
@@ -99,7 +99,10 @@ void write_mmo(string db, const storage &s)
     }
 
     if (map_id == 0)
+    {
+        printf("error: this map is not found in the database\n");
         return;
+    }
 
     auto this_map = storage->maps[map_id];
 
@@ -122,10 +125,10 @@ void write_mmo(string db, const storage &s)
                 {
                     auto bld = storage->addBuilding();
                     bld->text_id = o;
-                    bld_ids[o] = bld->id;
+                    bld_ids[o] = bld->getId();
                 }
                 else
-                    bld_ids[o] = iter->second->id;
+                    bld_ids[o] = iter->second->getId();
             }
             for (auto &object : segment->objects)
             {
@@ -146,7 +149,7 @@ void write_mmo(string db, const storage &s)
                 if (i == storage->mapBuildings.end())
                 {
                     auto mb2 = storage->addMapBuilding(storage->maps[map_id].get());
-                    mb.id = mb2->id;
+                    mb.setId(mb2->getId());
                     *mb2.get() = mb;
                 }
             }
@@ -170,10 +173,10 @@ void write_mmo(string db, const storage &s)
                 {
                     auto bld = storage->addObject();
                     bld->text_id = o;
-                    bld_ids[o] = bld->id;
+                    bld_ids[o] = bld->getId();
                 }
                 else
-                    bld_ids[o] = iter->second->id;
+                    bld_ids[o] = iter->second->getId();
             }
             for (auto &object : segment->objects)
             {
@@ -194,7 +197,7 @@ void write_mmo(string db, const storage &s)
                 if (i == storage->mapObjects.end())
                 {
                     auto mb2 = storage->addMapObject(storage->maps[map_id].get());
-                    mb.id = mb2->id;
+                    mb.setId(mb2->getId());
                     *mb2.get() = mb;
                 }
             }
diff --git a/src/obj_extractor/obj_extractor.py b/src/obj_extractor/obj_extractor.py
new file mode 100644
index 0000000..301b751
--- /dev/null
+++ b/src/obj_extractor/obj_extractor.py
@@ -0,0 +1,26 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+
+import argparse
+import os
+import subprocess
+
+def main():    
+    parser = argparse.ArgumentParser(description='Batch models converter')
+    parser.add_argument('--dir', dest='dir', help='path to directory with maps')
+    parser.add_argument('--db', dest='db', help='path to db')
+    pargs = parser.parse_args()
+
+    if pargs.dir:
+        run(pargs.dir, pargs.db)
+
+def run(dir, db):
+    for file in sorted(os.listdir(dir)):
+        if os.path.isdir(file) or os.path.splitext(file)[1] != ".mmo":
+            continue
+        print('loading: ' + file)
+        p = subprocess.Popen(['obj_extractor.exe', db, dir + '/' + file])
+        p.communicate()
+
+if __name__ == '__main__':
+    main()
diff --git a/src/obj_extractor/objects.h b/src/obj_extractor/objects.h
index 8ace369..fa24e1c 100644
--- a/src/obj_extractor/objects.h
+++ b/src/obj_extractor/objects.h
@@ -171,7 +171,7 @@ KNOWN_OBJECT(Anomaly);
 KNOWN_OBJECT(Boundary);
 
 #define UNKNOWN_OBJECT(name) \
-    struct name : public MapObject { void load(buffer &b){ int pos = b.getIndex(); assert(false); } }
+    struct name : public MapObject { void load(buffer &b){ int pos = b.index(); assert(false); } }
 
 UNKNOWN_OBJECT(Building);
 UNKNOWN_OBJECT(Goods);
diff --git a/src/tm_converter/tm_converter.bat b/src/tm_converter/tm_converter.bat
new file mode 100644
index 0000000..be0c4ee
--- /dev/null
+++ b/src/tm_converter/tm_converter.bat
@@ -0,0 +1 @@
+python tm_converter.py --dir "h:\\Games\\Epic Games\\Projects\\AIM\\models\\aim1\\"
\ No newline at end of file
diff --git a/src/tm_converter/tm_converter.cpp b/src/tm_converter/tm_converter.cpp
index a1403cb..db8d2d2 100644
--- a/src/tm_converter/tm_converter.cpp
+++ b/src/tm_converter/tm_converter.cpp
@@ -27,15 +27,31 @@
 
 using namespace std;
 
+void convert_simple(buffer &dst, buffer &src, int width, int height)
+{
+    int size = width * height * 2;
+    for (int i = 0; i < size; i++)
+    {
+        uint8_t c;
+        READ(src, c);
+        uint8_t lo = c & 0x0F;
+        uint8_t hi = (c & 0xF0) >> 4;
+        dst.write(uint8_t((lo << 4) | lo));
+        dst.write(uint8_t((hi << 4) | hi));
+    }
+}
+
 void tm2tga(string fn)
 {
     int width, height;
+    int dxt5 = 0;
 
     buffer src(readFile(fn));
     READ(src, width);
     READ(src, height);
-    src.reset();
-    src.skip(0x4C);
+    src.seek(0x10);
+    src.read(&dxt5, 1);
+    src.seek(0x4C);
     
     // http://paulbourke.net/dataformats/tga/
     buffer dst;
@@ -53,22 +69,19 @@ void tm2tga(string fn)
     dst.write(uint8_t(0x28)); // imagedescriptor
 
     const char *label = "AIMTMConverter";
-    dst.write(label, strlen(label), false);
+    dst.write(label, strlen(label));
 
-    int size = width * height * 2;
-    for (int i = 0; i < size; i++)
+    if (dxt5)
     {
-        uint8_t c;
-        READ(src, c);
-        uint8_t lo = c & 0x0F;
-        uint8_t hi = (c & 0xF0) >> 4;
-        dst.write(uint8_t((lo << 4) | lo));
-        dst.write(uint8_t((hi << 4) | hi));
+        //convert_dxt5(dst, src, width, height);
+        throw std::logic_error("dxt5 converter is not implemented!");
     }
+    else
+        convert_simple(dst, src, width, height);
 
     transform(fn.begin(), fn.end(), fn.begin(), ::tolower);
     fn = fn.substr(0, fn.rfind(".tm")) + ".tga";
-    writeFile(fn, dst.getBuf());
+    writeFile(fn, dst.buf());
 }
 
 int main(int argc, char *argv[])
diff --git a/src/tm_converter/tm_converter.py b/src/tm_converter/tm_converter.py
new file mode 100644
index 0000000..97921d4
--- /dev/null
+++ b/src/tm_converter/tm_converter.py
@@ -0,0 +1,24 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+
+import argparse
+import os
+import subprocess
+
+def main():    
+    parser = argparse.ArgumentParser(description='Batch textures converter')
+    parser.add_argument('--dir', dest='dir', help='path to directory with textures')
+    pargs = parser.parse_args()
+
+    if pargs.dir:
+        run(pargs.dir)
+
+def run(dir):
+    for file in sorted(os.listdir(dir)):
+        if os.path.isdir(file) or os.path.splitext(file)[1].lower() != ".tm":
+            continue
+        p = subprocess.Popen(['tm_converter.exe', dir + '/' + file])
+        p.communicate()
+
+if __name__ == '__main__':
+    main()