['Whilst', 'many', 'approaches', 'to', 'shading', 'analysis', 'have', 'been', 'proposed', ',', 'computational', 'efficiency', 'is', 'not', 'reported', 'despite', 'being', 'of', 'high', 'importance', 'when', 'incorporating', 'shading', 'algorithms', 'into', 'an', 'overall', 'energy', 'yield', 'model', '.']