"This will allow for an even exposure throughout the scene, and you won't have to decide which area to use as the anchor point for proper exposure. Another optimal scenario, given the same setting, is if Fluffy chooses to be in a different part of the house. She hopped down from the windowsill and is currently stretching out in the middle of the floor of the eastmost room. There's some light pouring in from the east-facing window. We could take this shot a million different ways, but how we position ourselves relative to the light source will make all the difference. As long as we shoot so that the sunlight is not being blocked by our subject or ourselves, we can really harness the power of the sun!"
Image Source: Andrew Marttila