Prompt example: 1girl, ((pink ancient outfit)), golden jewelry, shine necklace, long red hair, high-class, palace window in backgrounground, cinematic ambient lighting, masterpiece, extreme realistic.

A Second Order lens from Standard’s Rock lighthouse in Lake Superior. One of only a small handfull of this size lenses used in the Great Lakes. This one has bull eyes in the center and is meant to create a flash pattern as it is rotated.

Crepuscular rays, also known as god rays, are dramatic shafts of sunlight that appear to radiate from a single point in the sky. It can add depth and atmosphere to images, often creating a sense of awe or mystery.

Hovering over the thumbnail and click on the wrench icon to edit metadata. There you can add preferred weight, description, trigger words, etc.

Broad lighting is a photography technique where the side of the subject's face facing the camera is more brightly lit than the side facing away.

Caustics in lighting are the intricate light patterns formed when light rays interact with curved surfaces like water, glass, or shiny metal. These patterns, seen as bright shapes and lines, can add drama and visual interest to images.

*Source: Guardians of the Golden Gate: Lighthouses and Lifeboat Stations of San Francisco Bay Ralph Shanks and Lisa Woo Shanks, editor. 1995, Costano Books, ISBN: 0-930268-08-3.

Generally Fresnel lenses are divided into 7 classes (called “orders”). The order is determined by the distance of the flame to the lens. The “First Order Fresnel lens” is the largest lens widely used, and was installed in many of the largest “sea coast lights”. Two larger sizes were built in limited quantity and they are the for a couple of special installations. Smaller Fresnel lenses, such as the sixth-order lens, were installed in smaller lighthouses, such as breakwater lighthouses. See the chart below of lens orders which represents standard beehive type designs in general and not varying at all in characteristics..

Early Fresnel lenses were of standard shapes and designs with little deviation such as the one pictured above. They had an oil lantern that burned constantly from dusk until dawn with no flashing or blinking as you may think of them today. Once they started being used along the coasts in greater numbers the mariner could not tell where they were at night because nothing distinguished one light from another. For a lighthouse to be effective as an aid to navigation, it not only had to be seen, it also had to be identified as a unique location. This was necessary if ships were to use it to determine their own location and avoid hazards. From here on out different lenses were made with different characteristics and as such required different lens designs. This meant that a lot of lenses were now unique because they would require flash panels or bull’s eyes to distinguish one light from the next. The need to clearly identify each lighthouse was often solved by a specific pattern of flashes per minute. Although sometimes lighthouses identified themselves by using colored light, most made use of a flash of light, followed by a period of darkness. This pattern was called the lighthouse’s “characteristic.” Once electricity was introduced a light could use a flashing mechanism to give it a unique characteristic flash pattern. Now a sea captain could tell where he was by looking at a map and the flash pattern of the light and tell he was in Maine or Massachusetts.

Since the subjects being photographed have their faces turned sideways, neither of the following two AI images can be considered broad lighting because they are both facing the camera head-on. Still, they represent the essence where half of the face is lit up than the other side.

One possible reason is that Stable Diffusion cannot go for images that are all dim or all bright. It tries to balance the tone somehow. For instance, if you prefer to generate a snow mountain with white roof, Stable Diffusion might give you a black roof since a snow mountain is already bright and white.

This is a Third Order lens. This lens is a fixed lens and not meant to be rotated. Some of these lenses are on display around Michigan Museums. This one is the Big Bay Point lens on display in Marquette.

Besides pasting into the prompts, you can simply click the Lora tab and find epi_noseoffset together with other Lora models. Click on the epi_noiseoffset thumbnail and will be added automatically into your prompts.

A First Order lens found at the Ponce De Leon Inlet Lighthouse near Daytona Beach Florida. No First Order lenses were used in the Great Lakes. These lenses are huge!

Note: the starting value (the first value) should be in line with what you put in the prompts. For instance, if you use in the prompts, but put as the starting line in the X value:

Iridescent lighting creates a spectrum of colors like what you see on soap bubbles, oil slicks, or the wings of certain butterflies. If you love the vibrancy and shifting of colors, you can add iridescent in Stable Diffusion prompts, together with phrases such as:

🎬 Timestamp 00:35 Part 1. Why use Aiarty to enhance your workflow 01:10 Part 2. Image upscaling case #More-Detail Model 02:30 Part 3. Image upscaling case #Smooth Diff Model

These effects are often used to add a surreal, magical, or otherworldly quality to images. For instance, some of my favorite recipes are:

Blue hour photography captures the mesmerizing blue that fills the sky, shooting in a short period of time before sunrise or after sunset. This is one of my favorite Stable Diffusion lighting prompts as the result feels soothing and calming.

There are many sizes of Fresnel lenses, called ‘orders’, the largest being a first order, which is made up of hundreds of glass prisms. The lenses decrease in size through second order, third order, etc. Some have red panels, in order to shine a red light seaward. The glass prisms are shaped and positioned in such a way that the light from the single source inside the lens is reflected outward horizontally through each prism. In this way, the light streaming outward in all different directions is maximized into large beams shining out to sea. The number of beams depend on the configuration of the prisms, which can vary greatly. Different lighthouses must display beams for differing periods of time in order to be distinguished from one another.

Tips: according to the author of this Lora, it works better when using keywords like: dark studio, rim lighting, two tone lighting, dimly lit, low key in the prompts.

Below is a wrap up of lighting keywords you can use in Stable Diffusion. Do you have more suggestions? Leave me a message and I will be happily updating the list.

A Fourth Order lens was very typical on the Great Lakes and especially Michigan. A lot of pier head lights and lighthouses displayed one of these lenses. It was a lens size most commonly used throughout the lakes and some ocean coastal harbor stations.

Backlight, as its name suggests, comes from the back of the subject. If the subject has a certain degree of transparency, the backlight may appear as a rim light to some extent.

However, you don't necessarily need to follow the structure and include every aspect. Please note that the order of the tokens will also influence the outcome. Also, the best practice is to read the instructions of the author of a specific model. For instance, some models don't require you to include quality keywords to generate good results.

This Lora offers you much more flexibility in terms of dynamic range, enhancing the quality and visual of your image generations.

Stable Diffusion readily presents the style when you add Golden Hour in the prompts. You can also incorporate keywords such as photorealistic, vivid colors, and sharp focus if those are in line with your imagination.

This is a Fifth Order lens from the Ontonagon lighthouse. This lens exhibited a red light and as such had a red chimney placed around the lamp inside to make the lens color change. This is what is called a beehive type design. Although some lenses had flash panels installed on them, this one does not. This lens can be seen in downtown Ontonagon at the local museum.

To capture the flickering and twinkling appearance in Stable Diffusion, we can try to add "light particles, water drops, shimmering light, dreamy glow" whenever needed.

Stable Diffusion will throw at you an error saying: Prompt S/R did not find in prompt or negative prompt.

The Fresnel lens is the 1822 invention of French physicist Augustine Fresnel who invented a lens that would make his name commonplace along the seacoasts of Europe and North America. Most lenses were handmade and shipped unassembled from France. Others were made in England. Early lens designs resembled a giant glass beehive, with a light at the center (see examples below). The lens could be as tall as twelve feet high with concentric rings of glass prisms above and below a center drum section to bend the light into a narrow beam. Later designs incorporated a bull’s eye design into the center of the lens shaped like a magnifying glass, so the concentrated beam was even more powerful. Tests showed that while an open flame lost nearly 97% of its light, and a flame with reflectors behind it still lost 83% of its light, the Fresnel lens was able to capture all but 17% of its light. Because of its amazing efficiency, a Fresnel lens could easily throw its light 20 or more miles to the horizon.

Low-key and high-key photography are distinctive styles that can evoke specific moods with clean aesthetics. However, it is widely known that Stable Diffusion cannot properly handle these kind of images.

Note that not every technique in photography is transferrable to Stable Diffusion AI image generation. Below are some tokens that work.

SD images looks soft and blurry? Aiarty Image Enhancer can upscale Stable Diffusion Images to 16K/32K with details easily.

This Third and a Half Order lens was one typically built for service on the Great Lakes as it was a medium size between a Fourth and Third Order lens, a Fourth was to small and a Third was just to large for the intended use. This is a fixed lens and not a rotating lens. This is the Gray’s Reef lens and can be seen at the Charlevoix Historical Society Museum.

Loop lighting creates a small shadow of the subject's nose on their cheek, forming a loop-like shape. This technique adds depth and dimension to the subject's face without creating harsh shadows, and are quite popular in portrait photography.

In Stable Diffision, you can combine crepuscular rays with semantically related words such as dreamlike, otherworldly, ethereal, hazy background, mystic, eerie fog, and fantasy for different atmospheres.

You can recreate the loop lighting effects in Stable Diffusion. It may not succeed every time, but you can adjust the weight of (Loop Lighting:1.5) and arrange its position in the prompt.

In digital graphics, crepuscular rays can be referred to as volumetric lighting. It is the computer graphics replication to add depth and realism to scenes. In your Stable Diffusion lighting prompts, you can experiment with crepuscular rays and volumetric lighting and go with whatever works.

Below are some of the best lighting prompts in Stable Diffusion, followed by tutorials to use denoise offset Lora for high dynamic range images.

Using lighting prompts in Stable Diffusion is one way to control the light effects and visuals in your AI art. If you are familiar with photography lighting techniques, it will be much easier.

Rim lighting adds a bright outline along the edges of the character. In photography, it is achieved by placing a strong light source – either natural or artificial – behind the subject.

How to better control the lighting in Stable Diffusion for low-key and high-key photography? Luckily, now we have Epi_Noiseoffset Lora.

You can add broad lighting into your Stable Diffusion prompts and adjust its weight (Broad lighting: 1.5) until you are satisfied with the results.

You can also experiment with Prompt S/R to compare different weight. Go to Script (X/Y/Z plot) > X type: Prompt S/R > input X values.

512px low resolution is not enough for a 4K display or 300DPI print. When zoomed in, the image will look fuzzy and pixelated. The best solution is to use a Standalone Stable Diffusion Upscaler - Aiarty Image Enhancer.

This Sixth Order lens is the smallest of the lenses made for lighthouses. It was designed for small light stations or pier head type lights. This one is on display inside the Saulte Saint Marie Coast Guard Station. These lights were common in the Great Lakes on small harbors or piers.

Rembrandt lighting is popular in portrait photography. It can create compelling visuals characterized by a triangle light patch under the subject's eye on the dim side of the face (see screenshot below). The technique is named after the Dutch painter Rembrandt, known for its use in his artworks.

Lighting is the backbone of photography and illustration. It has the power to make or break a shot or a design. When generating images in Stable Diffusion, you may have encountered various challenges to control the lighting for fine results.

Golden hour photography is what I call the amazing twin of the blue hour. In photography, it refers to the short period after sunrise or before sunset, when the sky is lit with warm colors.

I love adding keywords such as movie still, deep blues, moody and ethereal atmosphere in Stable Diffusion. Still, it is not necessary to use it only for landscape AI art. For instance, when combining blue hour photography tokens with food photography or other themes, there can be surprisingly great results too.

Rico Rodriguez is an experienced content writer with a deep-rooted interest in AI. He has been at the forefront of exploring generative AI tools like Stable Diffusion. His articles offer valuable insights into the world of AI, providing readers with practical tips and informative explanations.

Luminescent effects are light emitted from substances without heating, such as bioluminescence, phosphorescence, and fluorescence. Using it in Stable Diffusion lighting prompts can create striking visuals, such as the soft illumination of glow-in-the-dark materials, or the natural glow of fireflies and deep-sea creatures.

Light shimmering, sparkling, or glimmering is often observed on bodies of water, where sunlight bounces off ripples or waves, creating a mesmerizing shimmer.