Scumbling
After setting ‘Tomorrow’ aside to let the paint dry, I went back to it. The background and falling rain needed lightening. The technique of scumbling is a good way to achieve what I was looking to do. I used a cool grey mix of undiluted oil paint and lightly brushed over the dry layer in the background. Using that same mix I tinted it with yellow and brushed in the rain and on the trees enhancing the glow.
Below is a detail of the area I worked on.
Below is a detail of the area I worked on.