Why? No horror environment quite manages to combine a sense of exposed vulnerability with one of disorientated claustrophobia like one that’s densely packed with skeletal, eerily impassive trees.

You’re out there in the uncharted wilderness, alone and cold, with no real sense of which direction the threat might be approaching from...and yet the feeble, shaky light from your faltering torch bounces off silver trunks and twisted shadowy branches, never allowing you to see further than 15 feet into the murk.

You’re screwed out here, aren’t you?

See: The Blair Witch Project

Don't: Make it look like a sort of jolly Sunday afternoon picnic gone hideously wrong. If we're in the woods, they need to be bleakly foreboding and alarmingly quiet - yomping retirees and children throwing sticks for their dog are strictly prohibited.