worth to note that apart from the 'typical' patterns you can get some crazy results by tweaking the values. I use it in processing all the time. also it can create a simple but incredible 'cinema' style blur (the stuff you only see on movie credits) on type.

see some extreme examples here: https://ello.co/zssz/post/9skesiflcmsycfhvkdtchw and a mold like structure here: https://www.instagram.com/p/CKxaqKFBF5c/