permeate, pervade, penetrate, interpenetrate, diffuse, imbue, riddle -- (spread or diffuse through; "An atmosphere of distrust has permeated this administration"; "music penetrated the entire building"; "His campaign was riddled with accusations and personal attacks")
diffused -- ((of light rays) subjected to scattering by reflection from a rough surface or transmission through a translucent material; "diffused light")
soft, diffuse, diffused -- ((of light) transmitted from a broad light source or reflected)