Though this picture, Down the Lake, represents a lake at twilight, it looks more or less abstract to me. Abstract photography or painting is based on colour palette and/or composition and the viewer has more freedom as far as the interpretation is concerned.
Twilight is the moment between sunset and night. It is divided into different phases according to science data, but for the photographer, the most striking characteristics of this time of the day are its unusual colours.
At sunset, the sky becomes darker and darker as the sun is going down little by little on the horizon. The sky is orange and red, the typical hues of sunset pictures.
Then orange colour still lingers on the horizon line for a time, but the sky is no longer red. Twilight colours are now displayed. The sky may be an intense blue and the sun illuminates the sky from below the horizon. The sky may have several bands of colours : purple, blue, remains of orange, and pink. This strange pink colour is always on the east, that’s to say, opposite the setting sun (on the west). This phenomenon appears only when the weather is fine.
Twilight is a magical hour, a fleeting moment to capture right away. Hesitate, run to fetch your camera and it may be too late.