Blending Light Trails in Photoshop: Deliberately Combining Night Shots

By Marko Bogdanovic Last updated on November 15, 2026 Shown in: Adobe Photoshop CC

You're standing at a gas station at night, the camera is set up, and you're waiting for passing cars. But even when the light trails come, everything rarely fits together at once: too few lights, a dark road, or a trail in the wrong place. With a single photo, this timing can hardly be hit perfectly. This is exactly where this tutorial comes in. It shows you how to combine several shots with simple Photoshop tools into an atmospheric image in which you decide for yourself how many light trails are visible and where they are placed.

Play video from YouTube

The video is only loaded from YouTube when you play it – data (including your IP address) is then transmitted to YouTube/Google. More in the privacy policy

The template comes from the video "Night Photography: Technique, Subjects & Practice" from the chapter on the gas station. The method is based on a blend mode in Photoshop and can be implemented in just a few steps.

Key Takeaways

• The "Lighten" blend mode only takes over the brighter areas of a layer. Dark parts of the base image remain unchanged.
• Layer masks give you control over which light trail becomes visible at which spot.
• Each additional shot can bring new trails, but also additional light on the road and surroundings.
• Changes in exposure or aperture create variety, such as star-shaped circles of light.
• The technique is suitable not only for light trails, but for any combination of multiple images with bright areas.

Step-by-Step Guide

Step 1: Prepare the Right Shots

Drag all the shots you want to use as layers into your Photoshop document. Make sure the images show the same framing so that they later lie exactly on top of each other. Sort out in advance what you don't need. A clear selection makes the entire editing process considerably easier, because later you won't have to search through a jumble of files for the right shot.

Step 2: Determine the Base Image

Choose as the base the image that has the most stable exposure and the best lighting of the scene. In the video, it is a shot in which the gas station is well lit and a first light trail is already visible. The base image forms the foundation for everything else, so it should be technically clean. Place it at the very bottom of the layers panel.

Step 3: Place the Second Shot on Top

Now drag another shot as a layer above the base image. This layer initially lies completely visible on the image and covers it. That's not a problem, because in the next step you'll ensure that only the relevant areas are taken over.

Step 4: Set the "Lighten" Blend Mode

In the layers panel, open the dropdown menu for the layer mode, which is set to "Normal" by default, and choose "Lighten". The image changes immediately, because the layers combine with each other. At first glance, the effect seems unspectacular, since initially only the additional trail appears. But that is precisely the strength of the method: you get another light trail without changing the entire scene.

Step 5: Understand Why the Blend Mode Works

The "Lighten" mode compares the brightness values of each pixel of the upper layer with the image beneath it. Only the brighter pixels are taken over. Everything that is darker than the base image is ignored. For night shots with a black sky and dark surroundings, this is ideal, because the glowing trails and lights are precisely the brightest elements in the image. So you don't have to make complicated selections for the lights to be transferred.

Step 6: Stay in Control with Layer Masks

The blend mode alone takes over everything bright, including things you don't want to see. That's why you create a layer mask for each layer. With a soft brush, paint in white on the mask over the areas that should be taken over, such as the desired trail. Everything you paint in black stays hidden. You can correct the mask at any time by swapping the colors or adjusting the brush opacity. Switch the mask off and on again from time to time to check which area you are actually taking over.

Step 7: Add More Shots and Brighten the Road

Repeat steps 3 to 6 for each additional shot. Each layer may bring a new trail. With some shots, however, not only trails are transferred, but also the light of passing vehicles on the road. You can use this effect deliberately to brighten the foreground and make the scene look more three-dimensional. If a turning vehicle places a light trail in a suitable area, a small section of the mask is often enough for it to fit perfectly into the image.

Step 8: Vary Exposure and Aperture

Not every shot has to be taken with identical settings. When shooting, you can deliberately adjust the brightness or close down the aperture a little. A smaller aperture (higher f-number) creates star-shaped light bursts, which transfer excellently into the image using the blend mode. This makes the composition more varied, and you gain additional creative freedom without the image looking busy.

Step 9: Finish Retouching and the Image Look

Once the base image is in place with all the desired lights, the final fine-tuning follows. Remove distracting elements such as trash or reflections with the repair tools. Then adjust the colors and give the image the desired look using tone curves or color balance. Make sure the retouching stays subtle so that the night atmosphere is preserved.

Step 10: Evaluate the Result and Recognize Possible Uses

At the end, compare the result with the original base image. The difference is clear: a rather unremarkable scene becomes a lively night shot full of atmosphere. The great advantage of this technique is that you can hide individual trails, show them again, or adjust their brightness at any time. The method is also not limited to light trails. Whenever you want to combine several shots with bright areas, such as string lights, stars, or reflections, the "Lighten" mode offers a quick and flexible solution.

Summary – Blending Light Trails in Photoshop: Combining Night Shots Deliberately

With the "Lighten" blend mode and layer masks, you combine several night shots into one image that matches your vision exactly. You choose a clean base image, place additional shots on top, take over only the bright areas, and use masks to control which trails become visible. Finally, you retouch the image and adjust the look. This way you achieve an atmospheric night shot, even if you don't have all the cars in front of the lens at the right moment at the same time.

Trainer About Marko Bogdanovic Marko Bogdanovic is in his mid-thirties and works as a freelance commercial & wedding photographer/filmmaker in the Black Forest. His skills include an enormous amount of technical know-how when it comes to cameras. All courses by Marko Bogdanovic →