视频素材：20组真实的下雨场景素材(带alpha透明通道+AE工程)
https://cloud.video.taobao.com//play/u/4128988553/p/1/e/6/t/1/21790541899...
视频素材-104种划痕污渍刮伤损坏叠加特效合成
https://cloud.video.taobao.com//play/u/4128988553/p/1/e/6/t/1/37253271627...
