Natural & Atmospheric Commonwealth, also known as NAC is an all in one weather, lighting and visual mod. Many of the war's historic battles, figures, and events were commemorated in the Commonwealth with monuments, statues, plaques, and museum exhibits. Arguably Fallout 4's most popular texture overhaul across all platforms, Vivid Fallout is truly something special. Fallout 4 commonwealth overhaul Showing 1-15 of 15 comments.