Global Atlanta: With lush brilliance evident even in watercolor, the green paradise shown in the artist's rendering includes a colorful town square, clean streets speckled with strolling pedestrians and a neighborhood of houses arrayed with neat white shutters. This vision of a new town in the Bahamas belongs to Tunnell-Spangler-Walsh & Associates, an Atlanta-based planning, architecture and landscape architecture firm. TSW was commissioned by the Bahamian government to design South Beach Township on New Providence Island, Bahamas...