diff --git a/LandblockExtraction/LandBlockExtractor/LandBlockExtrator.cs b/LandblockExtraction/LandBlockExtractor/LandBlockExtrator.cs
index d04368e..cf65fac 100644
--- a/LandblockExtraction/LandBlockExtractor/LandBlockExtrator.cs
+++ b/LandblockExtraction/LandBlockExtractor/LandBlockExtrator.cs
@@ -64,8 +64,8 @@ namespace LandblockExtraction.LandBlockExtractor {
         }
 
         private Vector2 GenerateBasicUV(int x, int y) {
-            float u = (float)x / (BlockSize - 1) * 16;
-            float v = (float)y / (BlockSize - 1) * 16;
+            float u = (float)x / (BlockSize - 1) * 8;
+            float v = (float)y / (BlockSize - 1) * 8;
 
             return new Vector2(u, v);
         }
@@ -79,25 +79,28 @@ namespace LandblockExtraction.LandBlockExtractor {
             }
 
             // Parcourt tous les indices et calcule les normales pour chaque triangle
-            for (int i = 0; i < blockStruct.indices.Length; i += 3) {
+            for (int i = 0; i < blockStruct.indices.Length; i += 6) {
                 int index1 = blockStruct.indices[i];
                 int index2 = blockStruct.indices[i + 1];
                 int index3 = blockStruct.indices[i + 2];
+                int index4 = blockStruct.indices[i + 5];
 
                 Vector3 vertex1 = blockStruct.verticesStruct.position[index1];
                 Vector3 vertex2 = blockStruct.verticesStruct.position[index2];
                 Vector3 vertex3 = blockStruct.verticesStruct.position[index3];
+                Vector3 vertex4 = blockStruct.verticesStruct.position[index4];
 
                 // Calcule la normale du triangle
                 /*Vector3 edge1 = vertex2 - vertex1;
                 Vector3 edge2 = vertex3 - vertex1;
                 Vector3 normal = Vector3.Cross(edge1, edge2);
                 normal = Vector3.Normalize(normal);*/
-                var normal = MathOperations.CalculateTriangleNormal(vertex1, vertex2, vertex3);
+                var normal = MathOperations.CalculateQuadNormal(vertex1, vertex2, vertex3, vertex4);
                 // Ajoute la normale du triangle aux normales des sommets du triangle
                 normals[index1] += normal;
                 normals[index2] += normal;
                 normals[index3] += normal;
+                normals[index4] += normal;
             }
 
             // Normalise toutes les normales de sommets pour qu'elles soient de longueur unitaire
diff --git a/Map3DRendering/Shaders/shader.frag b/Map3DRendering/Shaders/shader.frag
index b2e8c63..8de05a0 100644
--- a/Map3DRendering/Shaders/shader.frag
+++ b/Map3DRendering/Shaders/shader.frag
@@ -26,7 +26,7 @@ void main()
 
     float inclineFactor = abs(norm.y);
 
-    vec4 finalColor = mix(color0, color1, inclineFactor);
+    vec4 finalColor = mix(color0, color1, norm.y);
 
     vec3 lightDir = normalize(lightPos - FragPos);
     float diff = max(dot(norm, lightDir), 0.0);