Although we always strive to captured the actual day and night version for our translights, often with landscapes without any sources of light at night and a lot of greenery we generate the night version from the day. With out any artifical sources of light, a night image can come out looking flat, dark and dull, not to mention it would be almost impossible to ensure all of the leaves and branches would line up for the print.
Below is a video showing how we recently turned a day image captured on the Forbidden Drive in Philadelphia into the matching night version.