This week, we'll look at mirages. In particular the superior mirage known as Fata Morgana, named after the fairy shapeshifting half-sister of King Arthur. We come to rely on the normally stable optic perceptions that make up our daily experiences but now and again the physical world will throw you off. It's those moments that are the true reality of our existence. Testing us this week are Nicky Cairney, ShaMANoiD, Mustard Tiger, Rabbit Hole Revelations, Artemis and Merge of Equals. Try the new Idyllic Music app.