diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8a25f8c0..b3fd2f09 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -129,7 +129,6 @@ add_library(colobotbase STATIC
     graphics/model/model.cpp
     graphics/model/model.h
     graphics/model/model_crash_sphere.h
-    graphics/model/model_format.h
     graphics/model/model_input.cpp
     graphics/model/model_input.h
     graphics/model/model_io_exception.h
diff --git a/src/graphics/engine/oldmodelmanager.cpp b/src/graphics/engine/oldmodelmanager.cpp
index e1207ac9..c0891d49 100644
--- a/src/graphics/engine/oldmodelmanager.cpp
+++ b/src/graphics/engine/oldmodelmanager.cpp
@@ -52,23 +52,9 @@ bool COldModelManager::LoadModel(const std::string& fileName, bool mirrored, int
     CModel model;
     try
     {
-        CInputStream stream;
-        stream.open("models/" + fileName);
-        if (!stream.is_open())
-            throw CModelIOException(std::string("Could not open file '") + fileName + "'");
+        std::filesystem::path path = "models/" + fileName;
 
-        std::string::size_type extension_index = fileName.find_last_of('.');
-        if (extension_index == std::string::npos)
-            throw CModelIOException(std::string("Filename '") + fileName + "' has no extension");
-
-        std::string extension = fileName.substr(extension_index + 1);
-
-        if (extension == "mod")
-            model = ModelInput::Read(stream, ModelFormat::Old);
-        else if (extension == "txt")
-            model = ModelInput::Read(stream, ModelFormat::Text);
-        else
-            throw CModelIOException(std::string("Filename '") + fileName + "' has unknown extension");
+        ModelInput::Read(model, path);
     }
     catch (const CModelIOException& e)
     {
diff --git a/src/graphics/model/model_format.h b/src/graphics/model/model_format.h
deleted file mode 100644
index c046bc79..00000000
--- a/src/graphics/model/model_format.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * This file is part of the Colobot: Gold Edition source code
- * Copyright (C) 2001-2021, Daniel Roux, EPSITEC SA & TerranovaTeam
- * http://epsitec.ch; http://colobot.info; http://github.com/colobot
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see http://gnu.org/licenses
- */
-
-#pragma once
-
-namespace Gfx
-{
-
-/**
- * \enum ModelFormat
- * \brief Describes model format to use
- */
-enum class ModelFormat
-{
-    Text,   //!< new text format
-    Old        //!< old binary format, deprecated
-};
-
-} // namespace Gfx
diff --git a/src/graphics/model/model_input.cpp b/src/graphics/model/model_input.cpp
index 2dc29792..dca3c8b0 100644
--- a/src/graphics/model/model_input.cpp
+++ b/src/graphics/model/model_input.cpp
@@ -27,37 +27,22 @@
 namespace Gfx
 {
 
-CModel ModelInput::Read(std::istream &stream, ModelFormat format)
+void ModelInput::Read(CModel& model, const std::filesystem::path& path)
 {
-    stream.exceptions(std::ios_base::failbit | std::ios_base::badbit);
+    auto extension = path.extension();
 
-    CModel model;
-
-    try
+    if (extension == ".mod")
     {
-        switch (format)
-        {
-            case ModelFormat::Text:
-                ModelIO::ReadTextModel(model, stream);
-                break;
-
-            case ModelFormat::Old:
-                ModelIO::ReadOldModel(model, stream);
-                break;
-        }
+        ModelIO::ReadOldModel(model, path);
     }
-    catch (const CModelIOException& e)
+    else if (extension == ".txt")
     {
-        throw;
+        ModelIO::ReadTextModel(model, path);
     }
-    catch (const std::exception& e)
+    else
     {
-        throw CModelIOException(std::string("Other error while reading model data: ") + e.what());
+        throw CModelIOException(std::string("Unknown model format: ") + extension.string());
     }
-
-    return model;
 }
 
-
-
 } // namespace Gfx
diff --git a/src/graphics/model/model_input.h b/src/graphics/model/model_input.h
index d5f7bf44..195fb647 100644
--- a/src/graphics/model/model_input.h
+++ b/src/graphics/model/model_input.h
@@ -20,8 +20,8 @@
 #pragma once
 
 #include "graphics/model/model.h"
-#include "graphics/model/model_format.h"
 
+#include <filesystem>
 #include <istream>
 
 namespace Gfx
@@ -33,11 +33,7 @@ namespace Gfx
  */
 namespace ModelInput
 {
-    //! Reads model from \a stream in given \a format
-    /**
-     * @throws CModelIOException on read/write error
-     */
-    CModel Read(std::istream &stream, ModelFormat format);
+    void Read(CModel& model, const std::filesystem::path& path);
 }
 
 } // namespace Gfx
diff --git a/src/graphics/model/model_manager.cpp b/src/graphics/model/model_manager.cpp
index e0fa0951..d51e586e 100644
--- a/src/graphics/model/model_manager.cpp
+++ b/src/graphics/model/model_manager.cpp
@@ -35,16 +35,12 @@ CModel& CModelManager::GetModel(const std::string& modelName)
     if (it != m_models.end())
         return it->second;
 
-    std::string modelFile = "models-new/" + modelName + ".txt";
+    std::filesystem::path modelFile = "models-new/" + modelName + ".txt";
 
     GetLogger()->Debug("Loading new model: %s\n", modelFile.c_str());
 
-    CInputStream stream;
-    stream.open(modelFile.c_str());
-    if (!stream.is_open())
-        throw CModelIOException(std::string("Could not open file '") + modelName + "'");
-
-    CModel model = ModelInput::Read(stream, ModelFormat::Text);
+    CModel model;
+    ModelInput::Read(model, modelFile);
     m_models[modelName] = model;
 
     return m_models[modelName];
diff --git a/src/graphics/model/model_mod.cpp b/src/graphics/model/model_mod.cpp
index bd082b35..7aacbbad 100644
--- a/src/graphics/model/model_mod.cpp
+++ b/src/graphics/model/model_mod.cpp
@@ -47,8 +47,10 @@ void ConvertOldTex1Name(ModelTriangle& triangle, const char* tex1Name);
 void ConvertFromOldRenderState(ModelTriangle& triangle, int state);
 ModelLODLevel MinMaxToLodLevel(float min, float max);
 
-void ReadOldModel(CModel& model, std::istream& stream)
+void ReadOldModel(CModel& model, const std::filesystem::path& path)
 {
+    CInputStream stream(path);
+
     OldModelHeader header;
 
     try
diff --git a/src/graphics/model/model_mod.h b/src/graphics/model/model_mod.h
index 61232e0d..8c4056ba 100644
--- a/src/graphics/model/model_mod.h
+++ b/src/graphics/model/model_mod.h
@@ -20,8 +20,8 @@
 #pragma once
 
 #include "graphics/model/model.h"
-#include "graphics/model/model_format.h"
 
+#include <filesystem>
 #include <istream>
 
 /**
@@ -31,6 +31,6 @@
 namespace Gfx::ModelIO
 {
 
-void ReadOldModel(CModel& model, std::istream& stream);
+void ReadOldModel(CModel& model, const std::filesystem::path& path);
 
 }
diff --git a/src/graphics/model/model_output.cpp b/src/graphics/model/model_output.cpp
index 3fb44280..2d67a3c1 100644
--- a/src/graphics/model/model_output.cpp
+++ b/src/graphics/model/model_output.cpp
@@ -19,19 +19,12 @@
 
 #include "graphics/model/model_output.h"
 
-#include "common/ioutils.h"
-
-#include "graphics/model/model.h"
-#include "graphics/model/model_io_exception.h"
-#include "graphics/model/model_io_structs.h"
-
 #include <stdexcept>
-#include <fstream>
 
 namespace Gfx
 {
 
-void ModelOutput::Write(const CModel& model, std::ostream &stream, ModelFormat format)
+void ModelOutput::Write(const CModel& model, const std::filesystem::path& path)
 {
     throw std::logic_error("Not implemented");
 }
diff --git a/src/graphics/model/model_output.h b/src/graphics/model/model_output.h
index 799bc01f..e31da236 100644
--- a/src/graphics/model/model_output.h
+++ b/src/graphics/model/model_output.h
@@ -19,10 +19,9 @@
 
 #pragma once
 
-#include "graphics/model/model_format.h"
+#include "graphics/model/model.h"
 
-#include <ostream>
-#include <string>
+#include <filesystem>
 
 namespace Gfx
 {
@@ -35,7 +34,7 @@ namespace ModelOutput
     /**
      * @throws CModelIOException on read/write error
      */
-    void Write(const CModel& model, std::ostream& stream, ModelFormat format);
+    void Write(const CModel& model, const std::filesystem::path& path);
 }
 
 } // namespace Gfx
diff --git a/src/graphics/model/model_txt.cpp b/src/graphics/model/model_txt.cpp
index fe188401..9543d936 100644
--- a/src/graphics/model/model_txt.cpp
+++ b/src/graphics/model/model_txt.cpp
@@ -51,8 +51,10 @@ std::string ParseSpecialMark(const std::string& text);
 
 void ConvertFromOldRenderState(ModelTriangle& triangle, int state);
 
-void ReadTextModel(CModel& model, std::istream& stream)
+void ReadTextModel(CModel& model, const std::filesystem::path& path)
 {
+    CInputStream stream(path);
+
     int version = 0;
     try
     {
diff --git a/src/graphics/model/model_txt.h b/src/graphics/model/model_txt.h
index 80b87229..46a9dc16 100644
--- a/src/graphics/model/model_txt.h
+++ b/src/graphics/model/model_txt.h
@@ -20,8 +20,8 @@
 #pragma once
 
 #include "graphics/model/model.h"
-#include "graphics/model/model_format.h"
 
+#include <filesystem>
 #include <istream>
 
 /**
@@ -31,6 +31,6 @@
 namespace Gfx::ModelIO
 {
 
-void ReadTextModel(CModel& model, std::istream& stream);
+void ReadTextModel(CModel& model, const std::filesystem::path& path);
 
 }