Partial cloud cover during golden hour creates one of the most universally photogenic conditions. When 20-70% of the sky is covered by mid-level clouds, the low-angle sunlight catches their edges and underbellies, turning them golden. Too few clouds means a plain sky; too many blocks the sun entirely.
Inverza scores the sweet spot of cloud coverage, checks for adequate visibility, and factors in wind speed (gentle wind creates more textured, dynamic cloud formations). Mid-level clouds get a scoring bonus since they catch golden light best.