Direction of light and where to put your subject
Okay. Last time we talked about finding a window and figuring out what kind of light it's actually giving you — hard or soft, warm or cool, how bright. This lesson is about what to do with that window once you've found it. Specifically: where do you put the person relative to it.
This is the part people skip because it feels like a small detail. It is not a small detail. Direction of light changes a face more than almost anything else you'll do, including posing, including expression. You can have the friendliest smile in the world and if the light's coming from the wrong place it'll still look off.
So let's go through the main options.
Facing the window straight on
Subject faces the window, you stand with your back close to it, basically shooting from where the light's coming from. This is the safest, most flattering option for beginners, for sure for sure. It fills in the whole face evenly, no weird shadows, nothing dramatic. A little flat, honestly, if you do it every single time. But flat and even is a good place to start because it's forgiving. If you only learn one setup tonight, learn this one.
Window light from the side
Turn your subject about ninety degrees so the window's hitting one side of their face and the other side falls into shadow. This is where portraits start to get some shape to them. You'll see one side lit, one side dimmer, and a gradient across the nose and cheekbones that straight-on light just doesn't give you. It reads as more serious, more "portrait," less "phone snapshot." Some people love this look. Personally I use it a lot for men and older subjects because it tends to read as strong rather than harsh. On a younger face or someone self-conscious about skin texture, side light can be less kind, since it emphasizes texture instead of smoothing it out. Your mileage may vary — try it on your own subject before you decide it's your favorite.
Backlight — window behind the subject
This one's trickier and I'll be honest with you, it's the one that gets misused the most. If your subject has their back to the window, the window is now behind them and your camera has to expose for a much darker face against a much brighter background. Left on its own, your camera will usually expose for the bright window and turn your subject into a silhouette. That's a real effect some people want. It is dramatic. It is also very easy to get wrong by accident, so if you're going for it, go for it on purpose — lock your exposure to the face, not the window, and expect the window itself to blow out to white. That's fine. That's the trade.
The 45-degree angle
If straight-on is the safe choice and side light is the dramatic choice, 45 degrees is the one I tell people to actually live in. Turn your subject about halfway between facing the window and being sideways to it. You get a little shadow modeling on the far side of the face, some shape under the cheekbone, but the near side stays nicely lit. It's the setup you'll see in almost every studio portrait you've ever liked without knowing why you liked it. Start here, and only move to full side light or backlight once you've got a reason to.
Getting your subject there, practically
At home, this looks like: find your window, stand your subject a few feet back from it, and physically walk around them changing your own position while you check the shadow on their face through the viewfinder. Don't just guess from where you're standing — move, look, adjust. Small changes in angle make a bigger difference than you'd expect. A few inches one way and a shadow that was under the eye disappears entirely.
One real caution here: don't have your subject stare directly into a bright window for more than a few seconds at a time while you fuss with settings. It's uncomfortable, their eyes will water, and you'll get a squinty, watery-eyed shot for your trouble. Get your angle roughly right, then bring them in and shoot quickly.
And take more frames than feels necessary. This is where I bring up Jace. My oldest agreed to model for a lighting demo exactly once, and the entire time he kept asking if we were done yet. I probably shot sixty frames and got maybe four I'd call usable, because a bored kid reads as a bored kid in the photo every single time, no exceptions. Doesn't matter how good your light direction is if the person in front of it would rather be anywhere else. Keep them talking, keep them moving a little, keep the session short enough that boredom doesn't set in before you've got your shot. That's people management again, same as always.
At the end of the day, direction of light is just geometry — where's the window, where's the face, where's the shadow going to fall. Once you can see that relationship without having to think hard about it, everything else about portraits gets easier.
Before next time: find one window in your house and shoot the same person straight-on, at 45 degrees, and full side light, so you can compare all three side by side.