TV series Game of Thrones is loved for many things, but its impressive fantasy setting is obviously key to viewers being able to immerse themselves in the story as much as the books – where would we be without the sweeping battle landscapes and the fire-breathing dragons brought to life on our televisions?

Well, on set with a load of green screens, spray-can snow and blokes gluing stuff down, obviously.

Following fevered excitement over the series seven trailer, HBO has released a new behind-the-scenes clip providing a glimpse of the ridiculous amount of work that goes into creating such an epic programme – but be warned, seeing Daenerys without her dragons might unsettle you somewhat.

Watch the video below.

Have you seen Game of Thrones without the CGI effects?