Contribute correction: Sphere Redux (unreleased)

 ______    __   __    ______   __   __  
|      \\  \ \\/ //  /_   _//  \ \\/ // 
|  --  //   \ ` //   `-| |,-    \ ` //  
|  --  \\    | ||      | ||      | ||   
|______//    |_||      |_||      |_||   
`------`     `-`'      `-`'      `-`'