Been meaning to catch up on a few odds and ends lying around. This image of Venus was re-worked from Mariner 10 images by Mattias Malmer somewhere around 2005. It is an attempt at showing Venus in natural light and is far better than the version previously used as our “portrait” image for Venus. The issue is that Mariner 10 images only allow one to do that by taking some liberties with UV data. According to Malmer, “I think that if I were to make an even blander version of the this image it would be close enough to reality”.
See the original 2005 post on unmannedspaceflight.com where you can get this image at 4000×4000 resolution. Time for a wallpaper update.