Lumen Tool vs set.a.light 3D: which one is right for you?

I occasionally see people arrive at Lumen Tool after searching for set.a.light 3D.

That makes sense. Both tools let you experiment with lighting before you build the real setup, so from a distance they can look like alternatives to each other.

They do overlap, but they are built around very different ideas.

So instead of trying to argue that one is “better”, I wanted to put the two next to each other and make the difference clear. If set.a.light 3D is the better tool for what you need, you should use set.a.light 3D. If Lumen Tool fits your workflow better, then that is what you should use.

The point is simply to know what you are choosing.

The main difference

The shortest explanation is probably this:

set.a.light 3D is a complete virtual studio for photo and film. Lumen Tool is a fast lighting workspace.

With Lumen Tool, you open Photo Lighting and can immediately start working with the head and lights.

Change the angle. Raise a light. Move it closer. Make it softer. Add or adjust Fill, Back and Hair Light. The result changes immediately.

There is very little between opening Lumen Tool and actually experimenting.

set.a.light 3D takes a much broader approach. It lets you build complete 3D sets, position models, add furniture and props, choose lighting equipment and modifiers, work with cameras and lenses and plan much more of the final production.

That gives it considerably more scope.

It also means you are working in a much larger piece of software.

Lumen Tool is built around speed

This is probably the biggest strength of Lumen Tool.

There is no installation. You do not need to download a large asset library. You do not need to create a room, choose equipment or prepare a scene before you can start looking at light.

Open the page and move the light.

For a portrait photographer, videographer or someone setting up a talking-head shot, that can be the entire point.

You may simply want to answer questions such as:

• What happens if I move the Key Light further to the side?
• Is this closer to Loop or Rembrandt lighting?
• How much Fill do I want?
• Would a Back Light help separate the subject?
• How does the setup change on a different face?

That is the kind of work Lumen Tool is designed to make very fast.

set.a.light 3D is built around the complete shoot

If your question is bigger than the lighting on the subject, set.a.light 3D becomes much more interesting.

You can construct an environment, add props and furniture, position people inside it, work with a large range of virtual photographic equipment and plan camera positions as part of the same scene.

That means you can use it for much more detailed pre-production.

If you are planning a commercial shoot, a complicated studio setup or a scene where the environment matters just as much as the person, that extra control can be extremely useful.

The Cinema side goes even further into moving cameras, models and scene elements.

Lumen Tool does not try to do that.

What Lumen Tool does instead

Lumen Tool puts nearly all of its attention into the lighting workflow itself: building a setup, comparing it, and keeping it around for later.

Lumen Tool lets you build and compare setups around different heads, with multiple lights, different views, setup diagrams, comparisons, exports and saved setups.

Reference Lab approaches lighting from the opposite direction: you start with a portrait, and it analyses the visible lighting to give you a suggested starting point for the simulator.

The Archive then gives you a place to keep setups, comparisons, photos and notes together and reopen them later.

So while set.a.light 3D expands outward into the entire virtual production, Lumen Tool expands around the process of understanding, developing, comparing and keeping lighting ideas.

Real equipment and exposure

There is another important difference.

set.a.light 3D contains a large library of photographic lights and modifiers and goes much further into physical equipment and exposure simulation.

If you want to work around particular lights, modifiers and measured exposure behaviour, that is one of its major strengths.

Lumen Tool takes a more general approach.

It does not pretend that moving an intensity slider to a certain value means your real flash should be set to exactly the same number.

Your real exposure depends on the actual lamp, modifier, power, room, camera and subject.

Instead, Lumen Tool concentrates on the visual relationship between the lights and the subject: direction, distance, softness, colour, contrast and shadow shape.

The idea is to arrive at the real shoot already knowing roughly where the lights should be and what they should be doing, then fine-tune the actual output with the equipment in front of you.

The learning curve is different too

Lumen Tool is deliberately difficult to get lost in.

Most controls are visible immediately and the relationship is straightforward: move something and look at what happens.

That makes it useful not only for planning shoots, but also for learning lighting in the first place.

set.a.light 3D gives you far more things to control. For someone who needs those controls, that is a major advantage. For someone who only wants to explore portrait lighting for ten minutes, it may be far more than necessary.

Neither approach is automatically better.

It depends entirely on what you are trying to do.

Side by side

That table probably explains the difference better than anything else.

Which one should you choose?

If you want to build complete virtual shoots, work with specific equipment, construct sets, add props, position models and cameras and plan a production in detail, set.a.light 3D is probably the stronger choice.

That is exactly what it is built for.

If you mainly want to understand and plan lighting around a person, experiment quickly, compare ideas and keep those setups without installing another large application, Lumen Tool is probably the better fit.

That is exactly what I built it for.

There is also no reason the two could not exist in the same workflow. Someone could use set.a.light 3D for detailed production planning and still use Lumen Tool when they simply want to test a portrait-lighting idea quickly.

They solve overlapping problems, but they do not solve them in the same way.

See what is included

If Lumen Tool looks like the right kind of workflow for you, the Pricing page shows the current studios, modules, features and subscription options.

And if what you really need is complete virtual set building and detailed equipment simulation, set.a.light 3D is likely the more appropriate tool.

Choose the one that actually makes your work easier.

Update, 8 October 2026: the Set Builder next to set.a.light 3D

When I wrote the comparison above, Lumen Tool had nothing like a 3D set. That has changed. While writing this post I started wondering what a proper 3D photo studio inside Lumen Tool would look like, and that turned into Studio 5, the Set Builder. It’s in beta, and it’s included in the same membership.

So the line “Lumen Tool does not try to do that” isn’t true anymore. Time to compare the two again, this time looking only at the Set Builder.

The biggest difference: browser or installed software

set.a.light 3D is a software package you download and install on your computer. The Set Builder runs completely in your browser. There’s nothing to download and nothing to install, and there are no updates to run. You open the page and the newest version is simply there, on any computer you sign in on.

For me that’s the heart of Lumen Tool, and it’s the same for the Set Builder.

What the Set Builder does today

You pick a room and build a set in it. Right now there are two rooms, a white photo studio and a large loft, and you can change the daylight.

The library already has well over a hundred objects. There are around 35 lights, from softboxes, stripboxes and octaboxes to beauty dishes, umbrellas, a ring light, a lantern, a snoot, Fresnels and a projector with gobos. There’s light shaping with reflector discs, white and black V-flats, a flag and a diffusion frame. There are paper backdrops in different colors and seamless backdrops.

And there’s the rest of a real set. Furniture like sofas, armchairs, tables, chairs, a makeup station and a director’s chair. Grip like C-stands, sandbags, apple boxes and tripods. Props like framed prints, a rug, a stepladder, a clapperboard and a plant. Studio cameras, cinema cameras and a microphone stand are in there too.

There are twelve 3D people, and Isabella can be posed in detail. A single set can hold up to 100 objects, 12 lights and 6 people.

Lights come with a wattage and a color temperature, many of them take gels, and the light info shows an approximate output in lux at 3 meters. You look through a photo camera with focal lengths from 24 to 135 mm, apertures from f/1.4 to f/16, depth of field and different aspect ratios, with a camera monitor next to the 3D view. A top view shows the plan with distances, you can print a lighting plan, and setups are saved in versions and kept in the Archive.

Where set.a.light 3D is clearly ahead

The first one is real equipment. set.a.light 3D works with a library of real lights and modifiers from actual brands, and simulates exposure in a way you can take straight to set. The lights in the Set Builder are calibrated against each other, so a 300 watt light really is stronger than a 150 watt one, and distance and modifier size behave the way you’d expect. But they aren’t profiles of specific real lights. The Set Builder approximates what your own flash will do. It doesn’t measure it.

The second is the room itself. In set.a.light 3D you can shape the space you’re shooting in. In the Set Builder you furnish one of the two rooms, but you don’t build walls or your own room yet.

set.a.light 3D also has a lot more people and more posing options, and it has been developed for years. The Set Builder is weeks old. With its Cinema version, set.a.light also goes into moving cameras and scenes, which the Set Builder doesn’t do.

Where the Set Builder has its own strengths

Apart from running in the browser, it’s part of a bigger set of studios. You can try a portrait light on a head in Photo Lighting, read the light in a reference photo in Reference Lab and then build the full set in the Set Builder, all with the same account and the same Archive.

It’s also quick to get going. You can have a model, two lights and a camera in place within a few minutes.

Side by side: the Set Builder and set.a.light 3D

So which one now?

Let me make this simple.

If there’s one thing you want, and that’s building 3D sets with as many options as possible, official light measurements and animation, go for set.a.light 3D. Absolutely. That’s what it’s made for, and it does it very well.

If you like the idea of playing around with a 3D set as part of a package you already have, without paying anything extra, then Lumen Tool is the one. The Set Builder works really well at its core, and you can take it in all kinds of directions. It’s in the same membership as everything else in Lumen Tool.

I’ll keep this comparison up to date as the Set Builder grows.