Material flickering problem

Hello, i basically followed this tutorial:

http://www.tomlooman.com/recreating-dirty-bombs-health-station-fx/

but i’m getting this weird flickering Imgur: The magic of the Internet

while in the OP it was like this http://www.tomlooman.com/wp-content/uploads/2015/06/db_materialbreakdown01.gif
he adviced reporting the problem here for any help with it