diff --git a/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.j3md b/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.j3md
index f8df2ab02..cc4dae1bb 100644
--- a/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.j3md
+++ b/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.j3md
@@ -8,6 +8,9 @@ MaterialDef Terrain Lighting {
         // Use ward specular instead of phong
         Boolean WardIso
 
+        // Are we rendering TerrainGrid
+        Boolean isTerrainGrid
+
         // Ambient color
         Color Ambient
 
@@ -113,6 +116,7 @@ MaterialDef Terrain Lighting {
 
         Defines {
             TRI_PLANAR_MAPPING : useTriPlanarMapping
+            TERRAIN_GRID : isTerrainGrid
             WARDISO   : WardIso
 
             DIFFUSEMAP : DiffuseMap
diff --git a/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.vert b/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.vert
index f77eedb1e..648289e66 100644
--- a/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.vert
+++ b/engine/src/terrain/Common/MatDefs/Terrain/TerrainLighting.vert
@@ -36,8 +36,6 @@ varying vec4 SpecularSum;
   varying vec3 wNormal;
 #endif
 
-
-
 // JME3 lights in world space
 void lightComputeDir(in vec3 worldPos, in vec4 color, in vec4 position, out vec4 lightDir){
     float posLight = step(0.5, color.w);
@@ -52,7 +50,11 @@ void lightComputeDir(in vec3 worldPos, in vec4 color, in vec4 position, out vec4
 void main(){
     vec4 pos = vec4(inPosition, 1.0);
     gl_Position = g_WorldViewProjectionMatrix * pos;
+    #ifdef TERRAIN_GRID
+    texCoord = inTexCoord * 2.0;
+    #else
     texCoord = inTexCoord;
+    #endif
 
     vec3 wvPosition = (g_WorldViewMatrix * pos).xyz;
     vec3 wvNormal  = normalize(g_NormalMatrix * inNormal);
diff --git a/engine/src/test/jme3test/terrain/TerrainGridAlphaMapTest.java b/engine/src/test/jme3test/terrain/TerrainGridAlphaMapTest.java
index 8a0261bb0..c662dd79c 100644
--- a/engine/src/test/jme3test/terrain/TerrainGridAlphaMapTest.java
+++ b/engine/src/test/jme3test/terrain/TerrainGridAlphaMapTest.java
@@ -87,6 +87,7 @@ public class TerrainGridAlphaMapTest extends SimpleApplication {
         // TERRAIN TEXTURE material
         matRock = new Material(assetManager, "Common/MatDefs/Terrain/TerrainLighting.j3md");
         matRock.setBoolean("useTriPlanarMapping", false);
+        matRock.setBoolean("isTerrainGrid", true);
 
         // GRASS texture
         Texture grass = assetManager.loadTexture("Textures/Terrain/splat/grass.jpg");
@@ -189,7 +190,7 @@ public class TerrainGridAlphaMapTest extends SimpleApplication {
             }
 
             public void tileAttached(Vector3f cell, TerrainQuad quad) {
-                Texture alpha = assetManager.loadTexture("Scenes/TerrainAlphaTest/alphamap_" + Math.abs((int) (cell.x % 2)) * 512 + "_" + Math.abs((int) (cell.y % 2) * 512) + ".png");
+                Texture alpha = assetManager.loadTexture("Scenes/TerrainAlphaTest/alphamap_" + Math.abs((int) (cell.x % 2)) * 512 + "_" + Math.abs((int) (cell.z % 2) * 512) + ".png");
                 quad.getMaterial().setTexture("AlphaMap", alpha);
                 if (usePhysics) {
                     quad.addControl(new RigidBodyControl(new HeightfieldCollisionShape(quad.getHeightMap(), terrain.getLocalScale()), 0));