When a film is released today, it’s treated as a brand. Like a burger chain’s logo, artwork for posters and Blu-ray covers barely change between markets. But back in the 70s it was a different story. So when indie horror The Texas Chainsaw Massacre deservedly became a global sensation, distributors from Germany to Ghana had to whip up their own marketing materials. Some are brilliant by modern standards, others look as though they’ve been chopped together with a…well, you know.