diff --git a/première matrice 3D parametrable.png b/première matrice 3D parametrable.png
new file mode 100644
index 0000000..204bff8
Binary files /dev/null and b/première matrice 3D parametrable.png differ
diff --git a/src/graphics/buffers.c b/src/graphics/buffers.c
index dd6c2f7..a45c412 100644
--- a/src/graphics/buffers.c
+++ b/src/graphics/buffers.c
@@ -52,8 +52,8 @@ int plans_ndx = 0;
 #define EDGE 0.999999
 
 #define S 0
-#define S3 1
-#define SA 1
+#define S3 0
+#define SA 0
 #define A3 0
 
 #define L 0
@@ -328,15 +328,13 @@ static bool compute_space_3D (int size_x,
                 *(vertex_origin + vertex_ndx + 1) = y;
                 *(vertex_origin + vertex_ndx + 2) = z;
 
-                vertex_ndx += 3;
-                //  if (V) printf(" => vertex_ndx = %3d\n", vertex_ndx);
+                vertex_ndx += 3;                //  if (V) printf(" => vertex_ndx = %3d\n", vertex_ndx);
 
                 *(color_origin  + colors_ndx + 0) = x;
                 *(color_origin  + colors_ndx + 1) = 3 * y / 2;
                 *(color_origin  + colors_ndx + 2) = z;
 
-                colors_ndx += 3;
-                // if (C) printf(" => colors_ndx = %3d\n", colors_ndx);
+                colors_ndx += 3;                // if (C) printf(" => colors_ndx = %3d\n", colors_ndx);
 
                 if (P) printf("(%1.0f*%1.0f*%1.0f)<>[%6.3f %6.3f %6.3f] ", i, j, k, x, y, z);
             }
@@ -345,17 +343,25 @@ static bool compute_space_3D (int size_x,
         if (P) printf("\n");
     };
 
-    for (int u = 0; u < (size_x + 1) * (size_y + 1); u ++){ // << cette boucle est à remplacer, sur le modèle de la suivante.
-        *(line_origin + lines_ndx) = u * (size_z + 1);
-        lines_ndx += 1;
-        *(line_origin + lines_ndx) = u * (size_z + 1) + size_z;
-        lines_ndx += 1;
+    for (int u = 0; u < size_y + 1; u ++){
+        for (int w = 0; w < size_z + 1; w ++){
+            *(line_origin + lines_ndx) = w + (size_z + 1) * u; lines_ndx += 1;
+            *(line_origin + lines_ndx) = (size_x + 1) * (size_y + 1) * (size_z + 1)
+                  - (size_y + 1) * (size_z + 1) + w + (size_z + 1) * u; lines_ndx += 1;
+        }
+    }
+
+    for (int u = 0; u <= size_y; u ++){
+        for (int w = 0; w < size_x + 1; w ++){
+            *(line_origin + lines_ndx) = (size_z + 1) * (size_y + 1) * w + (size_z + 1) * u; lines_ndx += 1;
+            *(line_origin + lines_ndx) = (size_z + 1) * (size_y + 1) * w + size_z + (size_z + 1) * u; lines_ndx += 1;
+        }
     }
 
     for (int u = 0; u <= size_x; u ++){
         for (int w = 0; w < size_y; w ++){
-        *(line_origin + lines_ndx) = (size_z + 1) * (size_y + 1) * u + w; lines_ndx += 1;
-        *(line_origin + lines_ndx) = (size_z + 1) * (size_y + 1) * u + (size_z + 1) * size_y + w; lines_ndx += 1;
+            *(line_origin + lines_ndx) = (size_z + 1) * (size_y + 1) * u + w; lines_ndx += 1;
+            *(line_origin + lines_ndx) = (size_z + 1) * (size_y + 1) * u + (size_z + 1) * size_y + w; lines_ndx += 1;
         }
     }
 
diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index 7ca66cf..04f4fa2 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -539,7 +539,7 @@ GLubyte arrows[] = {
 
 static void get_model_data_and_user_preferences(){
 
-    model_space_size_x = 5;    //   0 < model_space_size_x
+    model_space_size_x = 10;    //   0 < model_space_size_x
     model_space_size_y = 4;    //   0 < model_space_size_y
     model_space_size_z = 3;    //   0 < model_space_size_z
     model_arrows_nb = 0; //  assert : l'emplacement des flèches est contraint