RenderTexture initWithSize 参数疑惑

请教大佬们 第三个参数depthStencilFormat 的详细用法
initWithSize(width?: number, height?: number, depthStencilFormat?: number)

https://github.com/cocos/cocos-engine/blob/v2.4.9/cocos2d/core/assets/CCRenderTexture.js