BBC Music - God Only Knows
Guitar Amps for the Brian May shots and Sun/Stars :
Modeling in Maya, Texturing in Quixel DDO and Photoshop
Shading, Lighting and Rendering in Arnold
Lighting of the Air Balloons in Arnold
Set assets, Suns and Stars
Lighting of the Air Balloons
Here's some Before/After breakdowns. Mouseover to see the magic happen!