Lighting Setup Diagram Tool

Planning your studio lighting setup before you arrive at the shoot saves time, reduces stress, and produces better results. This interactive diagram tool lets you visualize light placement by dragging light sources around a subject. You can start from scratch or load a classic portrait lighting pattern preset and modify it to fit your specific needs.

The tool includes presets for the six fundamental lighting patterns that every portrait photographer should know: Rembrandt, butterfly, split, loop, broad, and short lighting. Each preset positions the key light, fill light, rim light, and background light in the classic arrangement for that pattern. You can then drag any light to adjust the setup, add or remove lights, and see how the arrangement translates to a top-down diagram.

Whether you are a beginner learning your first studio lighting setup or an experienced photographer pre-visualizing a complex multi-light arrangement, this tool helps you think through light placement and communicate your vision to assistants, clients, or fellow photographers.

Lighting Setup Diagram Tool

Understanding Portrait Lighting Patterns

Portrait lighting is built on a foundation of patterns that have been refined over more than a century of photography and centuries of painting before that. These patterns describe the specific relationship between the light source, the subject’s face, and the camera position. Mastering them gives you a vocabulary for creating and communicating lighting setups reliably. Every complex multi-light setup is fundamentally a variation on these basic patterns.

The six core lighting patterns in the diagram tool above represent the essential building blocks of portrait lighting. Each creates a distinctly different mood, emphasizes different facial features, and flatters different face shapes. Understanding when and why to use each one is fundamental to photography lighting mastery.

Rembrandt Lighting

Rembrandt lighting is perhaps the most recognized portrait lighting pattern. It is identified by a small triangle of light on the shadow side of the face, typically visible on the cheek beneath the eye. The triangle should be no wider than the eye and no longer than the nose. This pattern is created by placing the key light high and about 45 degrees to one side of the subject.

The pattern creates a strong sense of three-dimensionality because it leaves significant areas of the face in shadow while maintaining enough light on both sides to preserve detail and recognition. It works particularly well for subjects with average to full face shapes. Very thin faces may look gaunt under Rembrandt lighting because the shadow areas can appear sunken.

In the diagram tool, notice how the key light is positioned at roughly 45 degrees from the camera-subject axis. The fill light opposite and lower controls how deep the shadows become. A rim light behind and to the opposite side creates separation from the background. Adjust the key light position and watch how moving it further to the side deepens the shadow pattern while moving it closer to the camera axis opens up the shadows.

Butterfly (Paramount) Lighting

Butterfly lighting places the key light directly in front of and above the subject. It creates a symmetrical shadow beneath the nose (shaped like a butterfly) and shadows under the cheekbones. This pattern was the signature look of Hollywood’s golden age glamour photography, used extensively at Paramount Studios, which is why it is also called Paramount lighting.

Butterfly lighting works best when the subject faces the camera directly and has prominent cheekbones and a lean face. The overhead angle of the light accentuates cheekbones and creates a slimming effect. It is less flattering for round faces or subjects with deep-set eyes, as the overhead angle can create dark eye sockets. A fill light or reflector placed below the face (sometimes called a clamshell setup when combined with the overhead key) opens up the shadows and adds a catch light in the lower part of the eyes.

Split Lighting

Split lighting illuminates exactly half the face by placing the key light at 90 degrees to the side. The dividing line runs straight down the center of the face, with one half fully lit and the other in shadow. This is the most dramatic of the standard patterns and is rarely used for commercial or corporate portraits. It shines in artistic, editorial, and music industry work where mood and intensity matter more than conventional flattery.

The extreme contrast of split lighting can be softened by adding subtle fill on the shadow side, but keep the fill very low (3:1 or 4:1 ratio) to maintain the split effect. Adding too much fill turns split lighting into something closer to Rembrandt or loop. A common variation is to add a rim light on the shadow side to create an edge of brightness that outlines the dark side of the face, adding separation and visual interest without reducing the dramatic impact.

Loop Lighting

Loop lighting is the workhorse of portrait photography. The key light is placed about 25 to 35 degrees to one side and slightly above the subject. This creates a small shadow loop from the nose that falls onto the cheek without connecting with the cheek shadow. It is a subtle, flattering pattern that works on nearly every face shape, which is why it is the most commonly used setup in portrait studios worldwide.

The distinction between loop and Rembrandt lighting is the nose shadow. In loop lighting, the nose shadow stays separate from the cheek shadow. In Rembrandt lighting, they connect to form the characteristic triangle. Moving the key light further to the side transitions loop lighting into Rembrandt lighting. This means you can fine-tune the mood of your portrait by making small adjustments to the key light position.

Broad and Short Lighting

Broad and short lighting are not separate patterns but rather positioning decisions that work in combination with any of the patterns above. When the subject turns their head slightly to one side, one side of the face becomes “broad” (closer to the camera and appearing wider) and the other becomes “short” (further from the camera and appearing narrower).

Broad lighting illuminates the broad side of the face. This makes the face appear wider and fuller, which is useful for very thin or narrow faces. It also produces a lower-contrast image because most of the visible face is lit.

Short lighting illuminates the short side of the face. This creates more visible shadow on the broad (camera-facing) side, producing a slimming effect and more three-dimensionality. Short lighting is the default choice for most portrait work because it is flattering to a wider range of face shapes and creates more interesting, dimensional images. Most people’s faces look best with short lighting because it emphasizes bone structure and creates a natural sense of depth.

The Role of Each Light in a Multi-Light Setup

Understanding what each light does in a setup helps you build lighting arrangements intentionally rather than randomly placing lights and hoping for the best.

• Key light: The primary light source. It establishes the lighting pattern, sets the exposure, and determines the overall mood. Every portrait setup starts with positioning the key light. All other lights are set in relation to it.
• Fill light: Placed opposite the key light, the fill controls the shadow density. A strong fill (close to the key light power) creates low-contrast, open lighting suitable for commercial and beauty work. A weak fill (or no fill) creates deep shadows for dramatic, moody portraits. The fill should never create its own shadow pattern; it should only lift the shadows created by the key.
• Rim (hair/edge) light: Placed behind the subject, the rim light creates a bright outline along the edge of the hair, shoulders, or body. This separates the subject from the background, adding depth to the image. Without a rim light, dark hair against a dark background can merge into a shapeless mass. Rim lights are typically set about 1 stop brighter than the key light so they create a visible edge without being overpowering.
• Background light: Illuminates the background independently of the subject. This lets you control the tone and texture of the background. Pointing a light at a white seamless can make it pure white. Gelling a background light adds color without affecting the subject. Positioning the background light low and aiming upward creates a graduated effect from bright to dark.

Building Your Lighting Setup Step by Step

The most common mistake beginners make with studio lighting is trying to set all lights at once. This leads to confusion because you cannot tell which light is causing which effect. Instead, build your setup one light at a time.

Start with only the key light. Turn off all other lights and light the subject with the key alone. Position it until you see the pattern you want (Rembrandt, loop, butterfly, or split). Set the power for correct exposure at your desired aperture. Study the shadows. Decide how much shadow fill you want.

Add the fill light next. Turn it on at low power and gradually increase until the shadow density looks right. The classic starting ratio is 2:1 (fill one stop lower than key) for commercial work or 4:1 (fill two stops lower) for more dramatic portraits. Take test shots and evaluate on your camera LCD.

Add the rim light. Position it behind the subject on the opposite side from the key light. Start at the same power as the key and adjust. The rim should create a visible edge of light without blowing out to pure white. Flagging or gridding the rim light prevents flare from hitting your lens.

Finally, add the background light if desired. This is the most optional light in many setups. Many powerful portraits use a plain, unlit background. But when you want a specific background tone or color, the background light gives you independent control.

Practical Tips for Studio Lighting

• Start simple. One light and a reflector can create every classic pattern. Add complexity only when you have a clear reason.
• Watch the catch lights. The reflection of lights in the subject’s eyes (catch lights) reveals your entire setup. Portrait photographers position key lights to create a catch light in the upper portion of the iris, typically at the 10 o’clock or 2 o’clock position.
• Control spill. Use grids, barn doors, and flags to keep each light focused on its intended target. Uncontrolled spill from a rim light hitting the nose, or a background light washing the subject, creates flat, muddy lighting.
• Use modeling lights. Most studio strobes have continuous modeling lights that show you an approximation of the flash output. Use these to preview your lighting before taking test shots.
• Measure with a light meter. A handheld incident light meter gives you objective exposure readings from the subject’s position. It is the fastest way to set lighting ratios accurately and consistently.
• Modify your light. Bare lights are harsh. A softbox, umbrella, or beauty dish turns a small point source into a large, soft source that wraps around the face. The larger the modifier (relative to the subject), the softer the light. Move it closer for softer light with more falloff, or further away for harder light with less falloff.
• Use the diagram tool for planning. Before your model or client arrives, plan your setup in the diagram tool and note the light positions. This saves expensive studio time and shows professionalism. You can walk into the studio and set up confidently rather than experimenting while everyone waits.

Mastering these fundamental patterns and the role of each light gives you the tools to create any studio lighting setup you can imagine. Every complex fashion editorial, every moody portrait, and every clean commercial headshot is built on these same foundations. Use the interactive diagram above to experiment with positioning and develop your intuition for how light placement translates to the final image.