Murrine is a Gtk2 engine, written in C language, using cairo vectorial drawing library to draw widgets. It features a modern glassy look, and it is elegant and clean on the eyes. It is also extremely customizable. For Aurora Gtk Engine, it is the latest member of the clearlooks family of gtk engines. The goal of this theme is to provide a consistent and complete look for Gtk. The theme aims to be very flexible in colour choice.
Many themes for Ubuntu and Gnome are using these 2 GTK2 engines. So if a theme for example uses the latest Murrine engine, then you can not install this theme without having Murrine engine installed in your system.
Install Murrine engine :
To install murrine engine first download the latest version from here then After the extraction of the file, go in the source dir and compile as following:
$ ./configure --prefix=/usr --enable-animation
#sudo make install
Install Aurora GTK2 engine :
To install Aurora GTK engine in Ubuntu 9.10 and ubuntu 10.04 lucid lynx :
sudo add-apt-repository ppa:merlwiz79/aurora
sudo apt-get update && sudo apt-get install aurora