diff --git a/shaders/shadow.geom.glsl b/shaders/shadow.geom.glsl
index b20b04e..ea50e6d 100644
--- a/shaders/shadow.geom.glsl
+++ b/shaders/shadow.geom.glsl
@@ -4,7 +4,13 @@
 layout(triangles) in;
 layout(triangle_strip, max_vertices = 18) out;
 
+#ifdef POINT_LIGHT
 uniform mat4 MVP[6];
+#elif defined CASCADED
+uniform mat4 frontShadowMVP;
+uniform mat4 midShadowMVP;
+uniform mat4 backShadowMVP;
+#endif
 
 out vec4 FragPos;
 
diff --git a/src/mesh.cpp b/src/mesh.cpp
index aecce41..e949191 100644
--- a/src/mesh.cpp
+++ b/src/mesh.cpp
@@ -16,6 +16,7 @@ const char* const Mesh::flagStr[Mesh::NB_FLAGS] =
     "MESH_2D",
 
     "TANGENT_SPACE",
+    "DOUBLE_SIDED",
     "BILLBOARD",
     "SHADOWED",
 
@@ -199,6 +200,8 @@ unsigned int Mesh::getFlags()
 
         if(!tangents.empty())
             flags |= 1 << MESH_TANGENT_SPACE;
+        if(isDoubleSided)
+            flags |= 1 << MESH_DOUBLE_SIDED;
         if(isBillboard)
             flags |= 1 << MESH_BILLBOARD;
         if(isShadowCaster)
diff --git a/src/mesh.h b/src/mesh.h
index dfaf51f..0c7b457 100644
--- a/src/mesh.h
+++ b/src/mesh.h
@@ -31,6 +31,7 @@ public:
 
         // 3D Geometric properties
         MESH_TANGENT_SPACE,
+        MESH_DOUBLE_SIDED,
         MESH_BILLBOARD,
         MESH_SHADOWED,
 
@@ -61,7 +62,15 @@ public:
     // 3D public data
     std::vector<glm::vec3> positions3D;
     std::vector<glm::vec3> normals;
-
+    
+    typedef struct
+    {
+        glm::vec3 tangent;
+        glm::vec3 binormal;
+    } Tangents;
+    
+    std::vector<Tangents> tangents;
+    
     // 2D public data
     std::vector<glm::vec2> positions2D;
 
@@ -69,7 +78,7 @@ public:
     std::vector<glm::vec2> texCoords;
     std::vector<glm::vec3> instances_offsets;
     std::vector<GLuint> indices;
-
+    
     /*************************************************************/
     /*                        MAIN METHODS                       */
     /*************************************************************/
@@ -130,7 +139,8 @@ public:
     /**
      * @brief setDepth allows to set the depth of a 2D mesh, the depth must be between -1 and 1, -1 being the closest to the camera
      */
-    void setDepth(float d) {depth = d;}
+    void setDepth(float d) { depth = d; }
+    float getDepth() { return depth; }
 
     /*************************************************************/
     /*                    3D MESH PROPERTIES                     */
@@ -197,14 +207,6 @@ public:
 
 protected:
 
-    typedef struct
-    {
-        glm::vec3 tangent;
-        glm::vec3 binormal;
-    } Tangents;
-
-    std::vector<Tangents> tangents;
-
     Material* material;
     bool isDoubleSided;
     bool isBillboard;
diff --git a/src/serializers.cpp b/src/serializers.cpp
new file mode 100644
index 0000000..1cd3c88
--- /dev/null
+++ b/src/serializers.cpp
@@ -0,0 +1,238 @@
+#include "serializers.h"
+
+#include <cstdio>
+
+#include "mesh.h"
+#include "light.h"
+#include "texture.h"
+
+namespace serializers
+{
+
+// STRUCTS
+
+struct MeshHeader
+{
+    unsigned int flags;
+    int nbPositions;
+    int depth;
+    int nbInstances_offsets;
+    int nbIndices;
+};
+
+struct LightHeader
+{
+
+};
+
+struct TextureHeader
+{
+
+};
+
+// PRIVATE FUNCTIONS
+
+bool serializeMesh(Mesh* mesh, const MeshHeader &header, FILE *file);
+
+bool deserializeMesh(Mesh* mesh, const MeshHeader &header, FILE *file);
+
+template<typename T>
+bool writeBuffer(const std::vector<T> &vec, std::FILE *file);
+
+template<typename T>
+bool readBuffer(std::vector<T> &vec, std::FILE *file);
+
+// IMPLEMENTATIONS
+
+template<typename T>
+bool writeBuffer(const std::vector<T> &vec, std::FILE *file)
+{
+    size_t nbWritten = std::fwrite(vec.data(), sizeof(T), vec.size(), file);
+    return (nbWritten == vec.size());
+}
+
+template<typename T>
+bool readBuffer(std::vector<T> &vec, std::FILE *file)
+{
+    size_t nbRead = std::fread(vec.data(), sizeof(T), vec.size(), file);
+    return (nbRead == vec.size());
+}
+
+bool saveMesh(const std::string &filename, Mesh *mesh)
+{
+    // open file
+    std::FILE *file = std::fopen(filename.c_str(), "w");
+    if(file == NULL)
+        return false;
+    
+    // creating header
+    MeshHeader header;
+    header.flags = mesh->getFlags();
+    if(header.flags & (1 << Mesh::MESH_3D))
+        header.nbPositions = mesh->positions3D.size();
+    else
+    {
+        mesh->positions2D.size();
+        header.depth = mesh->getDepth();
+    }
+    header.nbIndices = mesh->indices.size();
+    header.nbInstances_offsets = mesh->instances_offsets.size();
+    
+    // serializing
+    bool ok = false;
+    if(header.nbPositions != 0)
+        ok = serializeMesh(mesh, header, file);
+    
+    // finishing
+    std::fclose(file);
+    return ok;
+}
+
+bool serializeMesh(Mesh* mesh, const MeshHeader &header, FILE *file)
+{
+    // writing header
+    size_t nbWritten = std::fwrite(&header, sizeof(MeshHeader), 1, file);
+    if(nbWritten != 1)
+        return false;
+
+    // writing buffers
+    if(header.flags & (1 << Mesh::MESH_3D))
+    {
+        if(!writeBuffer(mesh->positions3D, file))
+            return false;
+        if(mesh->normals.size() == 0)
+            mesh->computeNormals();
+        if(!writeBuffer(mesh->normals, file))
+            return false;
+        if(header.flags & (1 << Mesh::MESH_TANGENT_SPACE))
+        {
+            if(!writeBuffer(mesh->tangents, file))
+                return false;
+        }
+    }
+    else
+    {
+        if(!writeBuffer(mesh->positions2D, file))
+            return false;
+    }
+    
+    if(header.nbInstances_offsets)
+    {
+        if(!writeBuffer(mesh->instances_offsets, file))
+            return false;
+    }
+    
+    if(header.nbIndices)
+    {
+        if(!writeBuffer(mesh->indices, file))
+            return false;
+    }
+    
+    if(header.flags & (1 << Mesh::MESH_TEXTURABLE))
+    {
+        if(!writeBuffer(mesh->texCoords, file))
+            return false;
+    }
+    
+    return true;
+}
+
+bool saveLight(const std::string &filename, Light *light)
+{
+    std::FILE *file = std::fopen(filename.c_str(), "w");
+    if(file == NULL)
+        return false;
+    
+    std::fclose(file);
+}
+
+Mesh* loadMesh(const std::string &filename)
+{
+    // open file
+    std::FILE *file = std::fopen(filename.c_str(), "r");
+    if(file == NULL)
+        return NULL;
+    
+    // reading header
+    MeshHeader header;
+    size_t nbRead = std::fread(&header, sizeof(MeshHeader), 1, file);
+    
+    // deserializing mesh
+    bool ok = false;
+    Mesh *mesh = NULL;
+    if(nbRead == 1 && header.nbPositions != 0)
+    {
+        mesh = new Mesh();
+        ok = deserializeMesh(mesh, header, file);
+    }
+    
+    // finishing
+    std::fclose(file);
+    
+    if(!ok && mesh != NULL)
+    {
+        delete mesh;
+        mesh = NULL;
+    }
+    return mesh;
+}
+
+bool deserializeMesh(Mesh* mesh, const MeshHeader &header, FILE *file)
+{
+    if(header.flags & (1 << Mesh::MESH_3D))
+    {
+        mesh->positions3D.reserve(header.nbPositions);
+        if(!readBuffer(mesh->positions3D, file))
+            return false;
+        mesh->normals.reserve(header.nbPositions);
+        if(!readBuffer(mesh->normals, file))
+            return false;
+        if(header.flags & (1 << Mesh::MESH_TANGENT_SPACE))
+        {
+            mesh->tangents.reserve(header.nbPositions);
+            if(!readBuffer(mesh->tangents, file))
+                return false;
+        }
+    }
+    else
+    {
+        mesh->positions2D.reserve(header.nbPositions);
+        if(!readBuffer(mesh->positions2D, file))
+            return false;
+        mesh->setDepth(header.depth);
+    }
+    
+    if(header.nbInstances_offsets)
+    {
+        mesh->instances_offsets.reserve(header.nbInstances_offsets);
+        if(!readBuffer(mesh->instances_offsets, file))
+            return false;
+    }
+    
+    if(header.nbIndices)
+    {
+        mesh->indices.reserve(header.nbIndices);
+        if(!readBuffer(mesh->indices, file))
+            return false;
+    }
+    
+    if(header.flags & (1 << Mesh::MESH_TEXTURABLE))
+    {
+        mesh->texCoords.reserve(header.nbPositions);
+        if(!readBuffer(mesh->texCoords, file))
+            return false;
+    }
+    
+    mesh->setIsBillboard(header.flags & (1 << Mesh::MESH_BILLBOARD));
+    mesh->setIsDoubleSided(header.flags & (1 << Mesh::MESH_DOUBLE_SIDED));
+    mesh->setIsShadowCaster(header.flags & (1 << Mesh::MESH_SHADOWED));
+    
+    return true;
+}
+
+Light* loadLight(const std::string &filename)
+{
+
+}
+
+}
diff --git a/src/serializers.h b/src/serializers.h
new file mode 100644
index 0000000..c59d899
--- /dev/null
+++ b/src/serializers.h
@@ -0,0 +1,19 @@
+#ifndef SERIALIZERS_H
+#define SERIALIZERS_H
+
+#include <string>
+
+class Mesh;
+class Light;
+class Texture;
+
+namespace Serializers
+{
+    bool saveMesh(const std::string &filename, Mesh *mesh);
+    bool saveLight(const std::string &filename, Light *light);
+    
+    Mesh* loadMesh(const std::string &filename);
+    Light* loadLight(const std::string &filename);
+}
+
+#endif // SERIALIZERS_H