Überzug is a command line util which allows to draw images on terminals by
using child windows.

Advantages to w3mimgdisplay:
- no race conditions as a new window is created to display images
- expose events will be processed,
- so images will be redrawn on switch workspaces
- tmux support (excluding multi pane windows)
- terminals without the WINDOWID environment variable are supported
- chars are used as position - and size unit
- no memory leak (/ unlimited cache)

WWW: https://github.com/seebye/ueberzug