【求助】雜訊效果

在PHOTOSHOP裡要怎麼做電視雜訊的效果ㄋ??
還有要怎麼新增填充圖層ㄋ?
謝謝~~~:D

[url]http://www.google.com/search?hl=zh-TW&ie=UTF-8&oe=UTF-8&q=%E9%9B%BB%E8%A6%96%E6%95%88%E6%9E%9C&lr=[/url]

[url]http://www.google.com/search?hl=zh-TW&ie=UTF-8&oe=UTF-8&q=%E5%A1%AB%E5%85%85%E5%9C%96%E5%B1%A4&lr=[/url]