Hello fellow nixers,
There are two types of background images popular in the Unix customization community, tiled wallpapers and blurred wallpapers.

We choose them because they are smooth and don't disrupt our focus from our workflow.

We already have a thread to share tiled walls and now here's the one where we share our scripts, images, and ideas, of blurry wallpapers.

Here are some utilities that can be used to blur an image:
Imagemagick
hsetroot which can set the wallpaper as blurred directly

http://alpha.wallhaven.cc/ is a great source of wallpapers.

A nice use of blurring is to use it when locking your desktop.
This blog post http://plankenau.com/blog/post-10/gaussianlock shows how to setup the desktop to blur once you lock it.

Share your experience with blurry images and wallpapers.