I have often been in a situation of seeing landscapes from a quickly passing river boat at a time of day of the most unappealing light. A current project is to re-imagine these scenes as if experienced in a more leisurely fashion with a paintbrush and canvas. Changing things with software is always a bit controversial, and a matter of taste, so feel free to comment.
Castle on the Rhine, with canvas texture
View across to York Minster, softened with a subtle brush-stroke effect
Garonne fishing rig, imagined in watercolour