The picture on the left is a towel on a white bed sheet without the flash. The picture on the right is the same picture but taken with the flash. The picture on the left without the flash seems so have more warm undertones that makes the towel and the sheet seem more soft. The picture with the flash makes the towel stand out more and makes it look more white and more harsh. The bed sheet in the back seems to be more smooth and flat and you can't see the shadows as much as the picture without the flash.