Image for Creating visual effects for Dr Who using computer-generated images and programs

Creating visual effects for Dr Who using computer-generated images and programs

Duration: 07:05

More recent episodes of Dr Who make extensive use of computer programming, particularly for controlling highly realistic visual effects (VFX) using computer-generated images (CGI).

A 3D model of a Dalek is drawn using computer software. Multiple copies are created and positioned automatically using a simple script (program). This allows for much greater numbers of Daleks to be seen on screen than when full-sized physical models are used. Editing the code, for example changing from a random number to a set number, changes the behaviour of the whole Dalek army. Incorporating human actors is done using a green screen (chroma key) effect, in which background pixels of recorded video are replaced by the computer-generated images.

Available since: Thu 14 Mar 2013

This clip is from

Cracking the Code

Minna Kane and her team of young hackers explore the world of computer programming.

First broadcast: 14 Mar 2013

Image for Cracking the Code Not currently available on BBC iPlayer

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.

Added. Check out your playlist Dismiss