PS Lesson 30 — Adjustment: Color Lookup

Photoshop · Lesson 30

One Click. A Completely Different World.

Color Lookup applies a LUT — a Look-Up Table — that mathematically remaps every color in your image simultaneously to a target look. It's how film emulation, cinematic color grading, and instant creative transformations happen with a single adjustment layer.

🎬

Film Emulation

Apply the color signature of Fuji Velvia, Kodak Portra, or Kodak Tri-X in one click. LUTs encode the entire color response of a film stock.

🖥️

Cinematic Grade

Broadcast and cinema color pipelines use LUTs as the final step in color grading. Apply those same professional looks instantly in Photoshop.

⚡

Speed

An entire complex color grade, encapsulated in a .cube file, applied in one click. Non-destructive. Adjustable with opacity and blending modes.

🎞️ LUTs originated in broadcast television and cinema as a way to preview and apply color transforms instantly. Photoshop's Color Lookup adjustment gives you access to that same professional tool.

Foundations

What a LUT Is

A LUT (Look-Up Table) is a mathematical table that maps input color values to output color values. Every possible input color has a corresponding output color defined in the LUT.

📊

Input → Output Mapping

Input R128, G90, B60 → Output R145, G95, B45. Every pixel in your image is looked up in this table and remapped simultaneously. The entire image transforms in one mathematical pass.

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🎛️

Not a Layer Stack

A LUT is not a stack of adjustments — it's a pre-computed result. The output of a complex pipeline (Curves + Color Balance + HSL) can be baked into a LUT for instant, one-click application.

🔬

Why It's Lossless and Fast

A 3D LUT stores color transforms as a 3D grid — typically 33×33×33 data points covering the entire RGB color space. When applied, Photoshop interpolates between grid points for each pixel. The result is mathematically equivalent to the original complex adjustment stack but applied in a single pass with no accumulated rounding error.

🧠 Think of a LUT as a color dictionary: "whenever you see this color, replace it with that color." Every single color in your image is looked up and remapped at once.

Workflow

How to Create a Color Lookup Layer

A

Layer Menu → New Adjustment Layer → Color Lookup

Most reliable. Properties panel opens showing the three LUT type dropdowns: 3DLUT File, Abstract, and Device Link.

B

Adjustments Panel → Color Lookup Icon

Window → Adjustments. Click the Color Lookup icon (the grid/cube icon). Creates the layer instantly. Properties opens to choose the LUT.

C

Layers Panel → Half-Moon Icon → Color Lookup

Click the half-moon at the bottom of the Layers panel → Color Lookup. Same result. Layer appears above the active layer with a white mask.

💡

Choose the LUT in Properties

Once created, click the 3DLUT File dropdown to choose a built-in LUT. For external LUTs, click "Load 3D LUT" at the bottom of the list and navigate to your .cube or .3dl file. To reopen Properties: double-click the adjustment layer icon.

✅ The Color Lookup layer shows no effect until you choose a LUT. Don't panic — it just defaults to "None." Pick a LUT from the 3DLUT File dropdown to see the transform.

Core Controls

The Three LUT Types

3D

3DLUT File — The Main One (use this)

A 3-dimensional look-up table that maps every combination of R, G, and B values. .cube and .3dl file formats. This is what film emulation, cinema, and creative grade LUTs use. The primary tool. All external LUTs you download use this format.

AB

Abstract — Photoshop Creative Presets

Photoshop's own creative LUT presets: Bleach Bypass, Crisp Warm, Crisp Cool, Matte, Soft Warming, and others. These are pre-built creative looks included with Photoshop. Good for quick exploration — limited compared to the 3DLUT library.

DL

Device Link — Color Profile Transforms (specialized)

Used for converting between color spaces in professional print and broadcast workflows. Rarely used by photographers. ICC Device Link profiles define transforms between specific ICC profiles. Skip this one unless you're in a managed print pipeline.

💡 3DLUT File is the only dropdown you'll need for 99% of creative work. Abstract has a handful of useful built-in looks. Device Link is for professional color management pipelines.

Built-In LUTs

The Film Look 3DLUT Presets

Photoshop ships with several film-emulation LUTs in the 3DLUT File dropdown. These encode the color response of iconic film stocks and cinema looks.

FJ

Fuji REALA 500D / F-LUTS — Cool, contrasty, saturated

Fuji film stocks are known for cooler shadows, saturated greens, and sharp tonal separation. This LUT pushes images toward that precise film signature — excellent for nature, travel, and documentary work.

KD

Kodak 2383 / K-LUTS — Warm, filmic, lifted shadows

Kodak's print film look: warm highlights, slightly lifted (not crushed) shadows, rich golden midtones. The cinema world's most recognized film look — used in countless Hollywood productions.

CL

Candlelight / Crisp Warm / Crisp Cool — Abstract built-ins

Photoshop's Abstract LUTs. Candlelight adds warm golden tones. Crisp Warm lifts shadows slightly while adding warmth. Crisp Cool pushes toward blue and desaturated shadows. Good for lifestyle and portrait work.

BB

Bleach Bypass — High contrast, desaturated, filmic

Simulates the silver-retention process from film development — bleach bypass skips the bleach step, leaving silver in the film. High contrast, muted saturation, strong grain feel. Dramatic and cinematic.

🧠 The built-in LUTs are a starting point. The real power comes from loading external .cube LUTs — thousands are available free online. We cover that on slide 9.

Built-In LUTs

Toning and Creative Built-In LUTs

Beyond film emulation, the built-in LUT library includes several toning and stylized creative looks — useful for portraits, editorial, and commercial photography.

🍂

Soft Warming

Lifts shadows gently while adding warmth.
Less aggressive than Warming Filter 85.
Slightly desaturated cool tones, slightly boosted warm tones.
Best for: portraits, lifestyle, warm editorial

🎭

Matte Look

Lifts shadow values — prevents deep blacks.
Reduces highlight brightness slightly.
Creates the characteristic faded matte look common in Instagram and cinema.
Best for: fashion, street, cinematic portrait

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The Matte Look and Lifted Blacks

The "matte" or "faded film" look that became dominant in the 2010s is achieved by lifting the black point — preventing shadows from reaching true black. A LUT that does this across all colors simultaneously is far more consistent than manually lifting the Curves shadow point. That's the value of a well-designed creative LUT.

🧠 Use the Abstract presets (Bleach Bypass, Matte, Soft Warming, Crisp Cool/Warm, Candlelight) as quick exploration tools before deciding whether to load a more specialized external LUT.

Control

Opacity and Blending Modes on a LUT Layer

Color Lookup is an adjustment layer — it has full access to Opacity and blending modes. This is where fine-tuning happens.

%

Opacity — Reduce Intensity

100% applies the LUT at full strength. 50% blends 50% LUT with 50% original. 30–70% is the most useful range — full-strength LUTs are often too strong for photographic use. Start at 100%, then reduce until the effect feels right.

Lm

Luminosity Blend Mode — Tonal Shift Only

Changes the LUT layer's blend mode from Normal to Luminosity. The LUT's tonal (brightness) changes apply, but the original saturation and hue are preserved. Great for using a film LUT's contrast structure without its color shifts.

Co

Color Blend Mode — Color Shift Only

Applies the LUT's hue and saturation changes but preserves original luminosity. Useful when the LUT's tonal curve is too dramatic but the color transformation is exactly what you want.

✅ The combination of a well-chosen LUT at 60–80% opacity in Luminosity mode is a professional staple. It adds a film-like tonal character without overwhelming the original image's color relationships.

Advanced Technique

Stacking LUT Layers

Multiple Color Lookup adjustment layers can be stacked — each one transforming the output of the one below it. Combining two LUTs at reduced opacity creates hybrid looks impossible to achieve with either alone.

1️⃣

Layer 1 — Film Stock LUT at 70%

Apply a Kodak 2383 film LUT at 70% opacity. Warm, filmic tonal foundation — lifted shadows, golden midtones. This sets the overall color character.

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2️⃣

Layer 2 — Grade LUT at 40%

Add a cinematic teal-orange grade LUT at 40%. The warm film base from Layer 1 meets the teal-shadow grade. The result has the film character of Kodak 2383 with cinematic shadow separation.

🎬

Professional Stacking Technique

In cinema post-production, it's common to apply a "technical LUT" (converting log footage to Rec.709 color space) followed by a "creative LUT" (adding the director's intended look). The same principle in Photoshop: a base correction LUT followed by a creative grade LUT is a powerful, flexible pipeline.

💡 Two LUTs at 50–70% opacity each are usually more useful than one LUT at 100%. The blend between them creates nuance that a single LUT can't produce.

Expanding the Library

Loading External LUTs

The built-in LUT library is a starting point. Thousands of free and paid .cube LUT files are available — from film emulations to cinema grades to brand-specific creative looks.

1

Download a .cube or .3dl LUT File

Free sources: RocketStock Free LUTs, Koji Color, Ground Control, Lutify.me free pack. Premium: many Lightroom preset vendors also sell LUT versions. Download and save to a dedicated folder on your drive.

2

Create a Color Lookup Layer → 3DLUT File Dropdown → Load 3D LUT

In Properties, click the 3DLUT File dropdown. Scroll to the bottom and choose "Load 3D LUT." Navigate to your downloaded .cube file and open it. The LUT applies immediately.

3

Install LUTs for Persistent Access

Copy .cube files to: Mac → /Library/Application Support/Adobe/Color/LUT/. PC → C:\Users\[Name]\AppData\Roaming\Adobe\Color\LUT\. After copying, restart Photoshop. Installed LUTs appear in the 3DLUT File dropdown alongside the built-ins.

✅ Install your most-used LUTs so they appear in the dropdown without needing to load them each time. A library of 10–20 carefully curated LUTs serves most creative work.

Comparison

Color Lookup vs. Photo Filter vs. Curves

CL

Color Lookup — Comprehensive color transformation

Applies a full R, G, B color space transformation simultaneously. Every color mapped to a specific output. Best for film emulation, cinema grades, and complex cross-color transforms. Can change the feel of an entire image holistically.

PF

Photo Filter — Single-color global tint

One color applied uniformly at adjustable density. Much simpler than a LUT — adds warmth, coolness, or a single color tint globally. Best for quick global mood shifts and color matching across a series.

Cu

Curves (per-channel) — Manual color grade

Build your own look by adjusting R, G, B channels as individual curves. Maximum flexibility — but requires time, skill, and iteration. What you build can be exported as a LUT and applied instantly to future images.

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Workflow Decision

"I want a quick warm or cool shift" → Photo Filter. "I want a complex, complete color transformation in one step" → Color Lookup. "I want to build a custom, precise grade from scratch" → Curves. "I want to apply a grade I built in Curves to 100 more photos" → Export as LUT, apply via Color Lookup.

🧠 These tools form a spectrum from simple to complex. Start with the simplest option that achieves the result. Escalate only when needed.

Technique

Film Emulation Workflow

A complete film emulation look using Color Lookup as the centerpiece — four adjustment layers, five minutes, professional result.

1

Hue/Saturation Layer — Reduce Saturation Slightly (−10 to −20)

Film doesn't render colors as saturated as a digital sensor. Pull saturation down slightly — not dramatically. This creates room for the LUT's color signature to breathe without fighting oversaturated digital color.

2

Color Lookup Layer → Kodak 2383 or Fuji LUT → 70% Opacity

Choose your film stock LUT. Set opacity to 70% — rarely use 100% for photography. This is the core transformation: the tonal curve, the shadow lift, the highlight character of the film stock.

3

Curves Layer — Gentle S-Curve for Contrast

Add a light S-curve: lift midtones slightly, deepen shadows slightly. This adds contrast without affecting the LUT's color character — the image gains presence while keeping the film look.

4

Evaluate and Adjust Opacity of the LUT Layer

Toggle the LUT layer visibility to compare before/after. Adjust opacity up or down 10% at a time until the transformation feels like a film interpretation, not a heavy filter. When in doubt, go less.

💡 This four-layer stack can be saved as a Photoshop Action and applied to a batch of images. The film emulation workflow becomes a one-click batch process for an entire shoot.

Challenge

Practice — Three LUTs, One Image

1

Open Any Photo — Preferably a Scene with Sky, Skin, and Foliage

The more color variety in the image, the more dramatically different LUTs will read. A cityscape, outdoor portrait, or travel image works well.

2

Create Color Lookup Layer → Choose LUT 1 → Adjust Opacity

Pick any built-in LUT from the 3DLUT File dropdown. Adjust opacity until the effect looks right — not too heavy. Note how the image has transformed.

3

Duplicate the Approach → Apply LUT 2 and LUT 3 on Separate Layers

Create two more Color Lookup layers with different LUTs. Toggle each layer's visibility on/off to compare all three versions against each other and against the original.

4

Pick Your Favorite — Then Try Luminosity Mode on It

Choose the LUT that best serves the image. Then change its blend mode from Normal to Luminosity. Compare Normal vs. Luminosity. Note how Luminosity applies tonal character while preserving original saturation.

💡 Bonus: stack your favorite LUT with a second LUT at 30% opacity. Notice how the combination produces a look neither LUT achieves alone. This is the professional stacking technique in action.

Lesson 30 Complete

One LUT. A Complete Transformation.

📊

What a LUT Is

A color remap table. Every input color maps to a specific output color simultaneously.

3D

Use 3DLUT Files

.cube and .3dl format. The main LUT type for creative photography. Abstract for built-in presets.

%

Reduce Opacity

LUTs are usually too strong at 100%. 50–80% opacity is the practical range for photographic use.

Lm

Luminosity Mode

Apply the LUT's tonal structure while keeping original saturation. Often the best blend mode for film LUTs.

🎬

Film Emulation

Desat slightly → LUT at 70% → gentle S-curve. Four layers, five minutes, film result.

≠

vs PF / Curves

PF = single global tint. Curves = manual precision. LUT = complete baked transformation. Stack all three when needed.

Up Next — PS Lesson 31

Adjustment: Invert

Invert creates the photographic negative — subtracting each channel value from 255. Artistic effects, luminosity masking, creative compositing, and a surprisingly powerful tool for understanding how channels work.

Start Lesson 31 →