Many different factors conspire to make the Scottish landscape as beautiful as it is, or for making any given walk particularly memorable. The different seasons, the colours, the quality of light, the wildlife, the list goes on. But few prompt walkers to wax quite so lyrical about the benefits of hillwalking as the cloud inversion – those joyous days when the cloud level is so low that the higher ground pokes up through it. Joyous, that is, for the lucky folk standing on the higher ground. For anyone standing on the lower ground it’s another matter entirely. Because in cold…