PERSPECTIVE
Asense of atmosphere and distance is achieved by the thoughtful use of aerial, or atmospheric, perspective. If you have a scene stretching out before you, you will notice that nearer objects will appear different in tonal value and colour temperature to those in the distance. In other words, objects may appear warmer in the foreground and cooler in the distance.
It's not as obvious or clear-cut as linear perspective, but aerial perspective creates an emotional response to what you are viewing. It's more of a feel for the mood of the landscape, and can be a decisive factor on whether we think a scene is worth painting or not.
The role of colour
If you were to stand on a hill with rolling
