LUTs stands for “lookup tables,” and in video or photo editing, a LUT is a preset table of color values that tells software how to change one color into another. Editors use LUTs to speed up color correction, create a consistent look, and preview how footage might appear after grading. Think of a LUT as a color translator: it reads the original image and outputs a new version with shifted contrast, brightness, saturation, and hue.
TLDR: A LUT is a lookup table that maps input colors to output colors. For example, a flat camera shot from a Sony, Canon, or Blackmagic camera can be converted into a natural Rec.709 image with one technical LUT. In a small editing team producing 20 short videos per month, LUTs can cut repetitive color setup time by 30% to 50%, especially when footage comes from the same camera and lighting setup.
What Does LUTs Stand For?
LUTs stands for lookup tables. The plural is a bit awkward, because “LUT” already means one table, while “LUTs” means multiple lookup tables. You will hear editors say things like “apply a LUT,” “use a camera LUT,” or “try a film LUT.” They all mean the same basic thing: a file that changes color values according to a prepared set of instructions.
A LUT does not “understand” your image in a human way. It does not know if the footage is a sunset, a face, a car commercial, or a wedding. It simply receives color information and returns adjusted color information. That simplicity is why LUTs are fast, portable, and widely used in editing tools such as DaVinci Resolve, Adobe Premiere Pro, Final Cut Pro, Photoshop, Lightroom, and many camera monitor systems.
How Lookup Tables Work
At the simplest level, a LUT says: if this color comes in, send that color out. Imagine a pixel with a certain red, green, and blue value. The LUT checks its table and replaces or adjusts that value with a new one. Multiply that by millions of pixels, and the entire image changes.
There are two common types of LUTs:
- 1D LUTs: These adjust values on a single channel or curve. They are often used for brightness, gamma, or contrast changes.
- 3D LUTs: These map colors across red, green, and blue together. They are much better for creative color looks, camera transforms, and film style grades.
A 3D LUT is called “3D” because it works like a cube of color data. Every color sits somewhere inside that cube. The LUT reshapes the cube, so blues may become more teal, skin tones may warm up, shadows may turn richer, and highlights may soften.
The catch is that LUTs are not magic. If your footage is badly overexposed, underexposed, or white balanced poorly, a LUT can make the problem louder. Honestly, it feels like the software is mocking you when one click turns a dull shot into orange skin and radioactive grass. That usually means the image needs correction before the LUT.
Technical LUTs vs Creative LUTs
Not all LUTs are meant to create a stylish look. Some are purely technical. Others are artistic. Knowing the difference saves time and prevents ugly results.
- Technical LUTs: These convert footage from one color space or gamma curve to another. A common example is converting Log footage to Rec.709 for normal screens.
- Creative LUTs: These add a mood or style. They may copy the feel of film stocks, music videos, travel content, fashion ads, or cinema grades.
- Monitoring LUTs: These are used on set so directors and clients can see a pleasing preview while the camera records a flat image.
For example, many cameras shoot in Log, which looks flat and gray at first. That flat image stores more highlight and shadow detail. A technical LUT can turn it into something closer to a finished image. After that, a creative LUT can push the mood toward warm, cool, gritty, soft, glossy, or dramatic.
How Editors Use LUTs for Color Correction
Color correction is the practical stage. The goal is to fix the image so it looks clean, balanced, and believable. This usually comes before creative grading.
Editors use LUTs for correction in several ways:
- Camera conversion: A Log to Rec.709 LUT brings flat footage into a standard viewing range.
- Color space matching: Footage from different cameras can be brought closer together.
- Exposure preview: A LUT helps reveal whether Log footage was exposed well.
- Client review: A quick LUT makes rough cuts look less unfinished.
Still, a LUT should not replace basic correction. A good workflow often looks like this:
- Set correct white balance.
- Adjust exposure.
- Fix contrast.
- Balance skin tones.
- Apply or adjust the LUT.
- Make final tweaks.
It drives me crazy that some editing apps hide LUT strength behind extra panels or tiny sliders. That can add 10 or 15 seconds per clip, which sounds small until you are grading 180 clips from a full day shoot.
How Editors Use LUTs for Color Grading
Color grading is where taste takes over. Once the image is corrected, the editor shapes the emotional feel. A corporate interview may need clean skin tones and soft contrast. A thriller may use deep shadows and cooler blues. A travel video may use bright warmth and stronger saturation.
LUTs help by giving editors a starting point. Instead of building a look from scratch every time, they can apply a LUT, reduce its intensity, and fine tune the result. Many editors apply a LUT at 20% to 70% strength rather than 100%. Full strength can be too harsh, especially on skin.
Good grading often includes small changes after the LUT:
- Lower saturation if colors look fake.
- Protect skin tones with masks or hue adjustments.
- Control shadows so dark areas do not crush detail.
- Adjust highlights to avoid clipped skies or shiny faces.
- Match shots so one angle does not feel disconnected from the next.
A LUT can establish the mood fast, but the editor still has to judge the image. This is why professional colorists rarely slap on a LUT and stop. They treat it as one tool in a larger process.
Common LUT File Types
Most video editors use LUT files with extensions such as .cube, .3dl, or .look. The .cube format is very common because it works across many programs and devices. You can often move a .cube LUT between a desktop editor, a camera monitor, and a grading suite.
Before using a LUT, check what it was made for. A LUT designed for S Log3 footage may not look right on C Log or V Log. A Rec.709 creative LUT may look strange if applied directly to flat Log footage without conversion. This mismatch is one of the most common reasons LUTs disappoint beginners.
Best Practices for Using LUTs
Use LUTs with intention. They can save hours, but they can also create a cheap filter look if pushed too far.
- Start with good footage. Proper exposure and white balance matter more than any LUT pack.
- Use the right LUT for the camera profile. Match S Log, C Log, V Log, Rec.709, or other profiles correctly.
- Lower the intensity. Many LUTs look better at half strength.
- Watch skin tones. Viewers forgive many things, but weird skin color stands out fast.
- Check scopes. Waveforms, vectorscopes, and histograms catch issues your eyes may miss.
- Do not stack random LUTs. Two strong LUTs can wreck contrast and color quickly.
Why LUTs Matter
LUTs matter because they bring speed and consistency to color work. A YouTube creator can keep a channel looking uniform. A wedding editor can match multiple cameras faster. A film crew can preview a final look on set while still recording flexible Log footage. In commercial work, a shared LUT helps everyone see the same visual direction before the final grade begins.
The best way to think about LUTs is simple: they are color recipes, not finished meals. They give you a reliable base, but taste, correction, and careful adjustment still matter. When used well, lookup tables can turn flat footage into polished images faster, while giving editors more control over the final mood.
