如何在Unity中双向拍摄？

// 创建前景相机
Camera foregroundCamera = gameObject.AddComponent<Camera>();
foregroundCamera.clearFlags = CameraClearFlags.SolidColor;
foregroundCamera.backgroundColor = Color.clear;

// 创建背景相机
Camera backgroundCamera = new GameObject("BackgroundCamera").AddComponent<Camera>();
backgroundCamera.clearFlags = CameraClearFlags.SolidColor;
backgroundCamera.backgroundColor = Color.clear;

// 创建渲染纹理
RenderTexture renderTexture = new RenderTexture(Screen.width, Screen.height, 24);

// 将前景相机的渲染目标设置为背景相机的渲染纹理
foregroundCamera.targetTexture = renderTexture;

// 将背景相机的渲染目标设置为屏幕
backgroundCamera.targetTexture = null;

// 设置前景相机在背景相机之前渲染
foregroundCamera.depth = backgroundCamera.depth - 1;