On the day the Glasgow Film Festival announces a screening of my movie – Sat 23 Feb at GFT2 – I travel to Tinto Hill to reshoot a sequence, not content with the original shot during the summer of 2009 because of poor light and low contrast. If there’s one thing you can’t buy it’s the weather, especially during a Scottish summer.

In 2007, the year I began shooting The Devil’s Plantation, I became obsessed with weather since virtually…