From BlenderWiki A script is a program that is written in the Python language which runs within Blender, and calls on Blender routines to create new functionality. Because Python is a popular interpreted programming language, it can be used to extend the functionality of Blender in a wide array of ways. Users all over the world have written hundreds of scripts, and this section of the Blender wiki attempts to catalog and document those scripts. It also provides information on how to use and write scripts easier and more effectively. Blender 2.6 has some big changes compared to 2.4.