diff --git a/examples/scene_graph_demo/romfs/shader/instanced.vert b/examples/scene_graph_demo/romfs/shader/instanced.vert
deleted file mode 100644
index b910b52..0000000
--- a/examples/scene_graph_demo/romfs/shader/instanced.vert
+++ /dev/null
@@ -1,73 +0,0 @@
-#version 320 es
-precision highp float;
-
-// 全局 UBO (binding = 0) - 每帧更新一次
-layout(std140, binding = 0) uniform GlobalUBO {
-    mat4 uViewProjection;
-    vec4 uCameraPosition;
-    float uTime;
-    float uDeltaTime;
-    vec2 uScreenSize;
-};
-
-// 材质 UBO (binding = 1) - 每批次更新
-layout(std140, binding = 1) uniform MaterialUBO {
-    vec4 uColor;
-    vec4 uTintColor;
-    float uOpacity;
-    float uPadding[3];  // std140 对齐填充
-};
-
-// 顶点属性 (每个顶点)
-layout(location = 0) in vec2 aPosition;
-layout(location = 1) in vec2 aTexCoord;
-layout(location = 2) in vec4 aColor;
-
-// 实例属性 (每个实例) - 使用 location 3-6
-layout(location = 3) in vec2 iPosition;   // 实例位置
-layout(location = 4) in float iRotation;  // 实例旋转
-layout(location = 5) in vec2 iScale;      // 实例缩放
-layout(location = 6) in vec4 iColor;      // 实例颜色
-
-// 输出到片段着色器
-out vec2 vTexCoord;
-out vec4 vColor;
-out vec4 vTintColor;
-out float vOpacity;
-
-/**
- * @brief 从旋转角度构建2D变换矩阵
- * @param angle 旋转角度（弧度）
- * @return 2x2旋转矩阵
- */
-mat2 rotate2D(float angle) {
-    float c = cos(angle);
-    float s = sin(angle);
-    return mat2(c, -s, s, c);
-}
-
-/**
- * @brief 顶点着色器入口
- *
- * 计算顶点在裁剪空间中的位置，
- * 应用实例的变换（位置、旋转、缩放），
- * 并传递纹理坐标和颜色到片段着色器
- */
-void main() {
-    // 应用实例缩放和旋转
-    vec2 localPos = rotate2D(iRotation) * (aPosition * iScale);
-
-    // 应用实例位置偏移
-    vec2 worldPos = localPos + iPosition;
-
-    // 变换到裁剪空间
-    gl_Position = uViewProjection * vec4(worldPos, 0.0, 1.0);
-
-    vTexCoord = aTexCoord;
-
-    // 混合顶点颜色、实例颜色和材质颜色
-    vColor = aColor * iColor * uColor;
-
-    vTintColor = uTintColor;
-    vOpacity = uOpacity;
-}