Complex sentence: Lange was funded by the federal government when she took the picture, so the image was in the public domain and Lange never directly received any royalties, although the picture and the attention it received gave a big boost to her career.
Split into simpler sentences: Lange was funded by the federal government when she took the picture, so the image was in the public domain and Lange never directly received any royalties. However, the picture and the attention it received gave a big boost to her career.