---A common tip for lighting is to use window light. However not all light from windows have the same quality or color. In that regard, painters have known for centuries that in the northern hemisphere, the light from a north-facing window is the softest and most constant window light because it never receives direct sunlight.
I decided to see for myself how different north light is from south light and from the light of a window facing away from the sun.
In this experiment, I took comparison shots in a large room that had similar-sized windows facing north, south and east (i.e. away from the sun). The sky was about the same in each direction. The shots were taken about 1pm.
And here are unedited straight-out-of-the-camera shots of the red ball from each direction:
|east (during the afternoon)|
I came back later in the afternoon when the sun was lower in the horizon and there were more clouds. Under those conditions, there was almost no difference between the shadows.