diff --git a/application/lucre/models/assets b/application/lucre/models/assets
index f910d4e9..5d8de711 160000
--- a/application/lucre/models/assets
+++ b/application/lucre/models/assets
@@ -1 +1 @@
-Subproject commit f910d4e98739eeb741c90d7b4f5b904554d6b1b9
+Subproject commit 5d8de7112ed127391780a2bc2e4f6d2070766497
diff --git a/application/lucre/terrainDescriptions/lucre island.json b/application/lucre/terrainDescriptions/lucre island.json
index 114b99a0..005c143e 100644
--- a/application/lucre/terrainDescriptions/lucre island.json	
+++ b/application/lucre/terrainDescriptions/lucre island.json	
@@ -3,6 +3,7 @@
     "description": "height map 2",
     "author": "Copyright (c) 2024 Engine Development Team",
     "heightMapPath": "application/lucre/models/assets/terrain/lucreIsland1 heightmap.png",
+    "grassHeightMapPath": "application/lucre/models/assets/terrain/lucreIsland1 heightmap2.png",
     "colorMapPath": "application/lucre/models/assets/terrain/lucreIsland1 colormap.png",
     "material":
     {
diff --git a/engine/platform/Vulkan/shaders/grass.vert b/engine/platform/Vulkan/shaders/grass.vert
index 561f551a..8080b4aa 100644
--- a/engine/platform/Vulkan/shaders/grass.vert
+++ b/engine/platform/Vulkan/shaders/grass.vert
@@ -66,8 +66,8 @@ layout(set = 2, binding = 0) uniform InstanceUniformBuffer
     InstanceData m_InstanceData;
 } baseTransform;
 
-#define WIDTH 1024 // row
-#define HEIGHT 750 // col
+#define WIDTH 512 // row
+#define HEIGHT 375 // col
 #define NUM_HEIGHT_VALUES WIDTH*HEIGHT // 768000
 #define INSTANCE_COUNT NUM_HEIGHT_VALUES
 
@@ -92,16 +92,19 @@ void main()
     float row = floor(index / WIDTH);
     float col = floor((index - WIDTH * row));
 
-    mat4 localTranslation = mat4
+    float theta = sin(hgt+gl_InstanceIndex); // random
+    float s = sin(theta); // sine
+    float c = cos(theta); // cosine
+    mat4 localTransform = mat4
     (
-        vec4(4.0, 0.0, 0.0, 0.0), // first column
-        vec4(0.0, 4.0, 0.0, 0.0), // second column
-        vec4(0.0, 0.0, 4.0, 0.0), // third column
-        vec4(col, row, -hgt, 1.0)  // fourth column
-    );          
+        vec4(5.0 * c,       s,   0.0, 0.0), // first column
+        vec4(     -s, 5.0 * c,   0.0, 0.0), // second column
+        vec4(    0.0,     0.0,   5.0, 0.0), // third column
+        vec4(    col,      row, -hgt, 1.0)  // fourth column
+    );
 
     // projection * view * model * position
-    gl_Position = ubo.m_Projection * ubo.m_View * baseModelMatrix * localTranslation * vec4(position, 1.0);
+    gl_Position = ubo.m_Projection * ubo.m_View * baseModelMatrix * localTransform * vec4(position, 1.0);
 
     vec4 positionWorld = baseModelMatrix * vec4(position, 1.0);
     fragPosition = positionWorld.xyz;
diff --git a/engine/renderer/builder/terrainBuilder.cpp b/engine/renderer/builder/terrainBuilder.cpp
index 40c6f0ab..b02089a8 100644
--- a/engine/renderer/builder/terrainBuilder.cpp
+++ b/engine/renderer/builder/terrainBuilder.cpp
@@ -288,7 +288,7 @@ namespace GfxRenderEngine
                               !EngineCore::IsDirectory(terrainSpec.m_FilepathGrassModel);
             if (fileExists)
             {
-                Image& heightMap = *terrainComponent.m_HeightMap.get();
+                Image heightMap(terrainSpec.m_FilepathGrassHeightMap);
                 uint heightMapSize = heightMap.Size();
                 Resources::ResourceBuffers resourceBuffers;
                 {
@@ -321,7 +321,7 @@ namespace GfxRenderEngine
                         auto& transform = registry.get<TransformComponent>(grassEntityRoot);
                         transform.SetRotation({3.14159f, 0.767164f, 3.14159f});
                         transform.SetTranslation({4.37885f, -1.14346f, 59.3405f});
-                        transform.SetScale({0.0649992f, 0.0376f, 0.0649992f});
+                        transform.SetScale({0.1299984f, 0.0376f, 0.1299984f});
                     }
                 }
             }
diff --git a/engine/scene/terrain.h b/engine/scene/terrain.h
index fa72fbd2..7b8b400f 100644
--- a/engine/scene/terrain.h
+++ b/engine/scene/terrain.h
@@ -52,6 +52,7 @@ namespace GfxRenderEngine
             Material::PbrMaterial m_PbrMaterial{};
             std::string m_FilepathTerrainDescription;
             std::string m_FilepathHeightMap;
+            std::string m_FilepathGrassHeightMap;
             std::string m_FilepathColorMap;
             std::string m_FilepathGrassModel;
         };
diff --git a/engine/scene/terrainLoaderDeserializeJSON.cpp b/engine/scene/terrainLoaderDeserializeJSON.cpp
index c54d7049..a99ed409 100644
--- a/engine/scene/terrainLoaderDeserializeJSON.cpp
+++ b/engine/scene/terrainLoaderDeserializeJSON.cpp
@@ -85,6 +85,15 @@ namespace GfxRenderEngine
                 terrainSpec.m_FilepathHeightMap = m_TerrainDescriptionFile.m_FilepathHeightMap;
                 LOG_CORE_INFO("Heightmap Path: {0}", m_TerrainDescriptionFile.m_FilepathHeightMap);
             }
+            else if (terrainAttributesKey == "grassHeightMapPath")
+            {
+                CORE_ASSERT((terrainAttributes.value().type() == ondemand::json_type::string),
+                            "grass heightmap path must be string");
+                std::string_view grassHeightMapPath = terrainAttributes.value().get_string();
+                m_TerrainDescriptionFile.m_FilepathGrassHeightMap = std::string(grassHeightMapPath);
+                terrainSpec.m_FilepathGrassHeightMap = m_TerrainDescriptionFile.m_FilepathGrassHeightMap;
+                LOG_CORE_INFO("Heightmap Path: {0}", m_TerrainDescriptionFile.m_FilepathGrassHeightMap);
+            }
             else if (terrainAttributesKey == "colorMapPath")
             {
                 CORE_ASSERT((terrainAttributes.value().type() == ondemand::json_type::string),
diff --git a/engine/scene/terrainLoaderJSON.h b/engine/scene/terrainLoaderJSON.h
index ed298bb4..993ddf4a 100644
--- a/engine/scene/terrainLoaderJSON.h
+++ b/engine/scene/terrainLoaderJSON.h
@@ -53,6 +53,7 @@ namespace GfxRenderEngine
             std::string m_Description;
             std::string m_Author;
             std::string m_FilepathHeightMap;
+            std::string m_FilepathGrassHeightMap;
             std::string m_FilepathColorMap;
             std::string m_FilepathGrassModel;
             Material::PbrMaterial m_PbrMaterial;