An exception (Patreon)

I generally don’t like to light models from two sides, and in this case, the model is standing in a window alcove that wraps around on three sides:

The backlight on light from the left is more or less from the same angle, but the light from the right opposes that. In this case, I can (mentally) justify it as it is a natural environment where you can perceive that there is probably a window, so it still seems realistic.

But had I had a black flag or some black karton, I would rather have blotted out the window.

The model is Zane, a former Playboy model who no longer models.