diff --git a/blender_util.py b/blender_util.py
index c00691f..7e5fe11 100644
--- a/blender_util.py
+++ b/blender_util.py
@@ -229,8 +229,36 @@ class BlenderUtils:
             output_depth.format.color_mode = 'BW'
             output_depth.format.color_depth = '16'
 
-            tree.links.new(map_range.outputs[0], output_depth.inputs[0])
+           # 创建 Separate XYZ 节点来分离法线的 X, Y, Z 分量
+            separate_xyz = tree.nodes.new('CompositorNodeSeparateXYZ')
 
+            # 将法线向量连接到 Separate XYZ 节点
+            tree.links.new(rl.outputs['Normal'], separate_xyz.inputs[0])
+
+            # 创建 Map Range 节点来分别映射 X, Y, Z 分量
+            map_range_x = tree.nodes.new('CompositorNodeMapRange')
+            map_range_y = tree.nodes.new('CompositorNodeMapRange')
+            map_range_z = tree.nodes.new('CompositorNodeMapRange')
+
+            # 设置映射范围
+            for map_range in [map_range_x, map_range_y, map_range_z]:
+                map_range.inputs['From Min'].default_value = -1
+                map_range.inputs['From Max'].default_value = 1
+                map_range.inputs['To Min'].default_value = 0
+                map_range.inputs['To Max'].default_value = 1
+
+            # 分别连接到法线的 X, Y, Z 输出
+            tree.links.new(separate_xyz.outputs['X'], map_range_x.inputs[0])
+            tree.links.new(separate_xyz.outputs['Y'], map_range_y.inputs[0])
+            tree.links.new(separate_xyz.outputs['Z'], map_range_z.inputs[0])
+
+            # 合并 X, Y, Z 分量到一个 RGB 输出
+            combine_rgb = tree.nodes.new('CompositorNodeCombineXYZ')
+            tree.links.new(map_range_x.outputs[0], combine_rgb.inputs['X'])
+            tree.links.new(map_range_y.outputs[0], combine_rgb.inputs['Y'])
+            tree.links.new(map_range_z.outputs[0], combine_rgb.inputs['Z'])
+
+            # 输出到文件
             output_normal = tree.nodes.new('CompositorNodeOutputFile')
             normal_dir = os.path.join(output_dir, "normal")
             if not os.path.exists(normal_dir):
@@ -240,8 +268,8 @@ class BlenderUtils:
             output_normal.format.file_format = 'PNG'
             output_normal.format.color_mode = 'RGB'
             output_normal.format.color_depth = '8'
-            tree.links.new(rl.outputs['Normal'], output_normal.inputs[0])
-            
+
+            tree.links.new(combine_rgb.outputs[0], output_normal.inputs[0])
             bpy.ops.render.render(write_still=True)