This tutorial is in German. It explains how to create a blur background when opening a folder, with a fade animation.
Thanks to Sascha Roehrbein for writing and sharing this nice tutorial.
Download as a single file (scripts, instructions as a PDF): LLX-blu-BG-Tutorial.rar
As part of the tutorial, you need to create two scripts:
blur an
var editor = LL.getVariables().edit();
editor.setInteger("myalpha", 255);
editor.commit();
blur aus
var editor = LL.getVariables().edit();
editor.setInteger("myalpha", 0);
editor.commit();