Photoshop-Style Curve Editor – ComfyUI Plugin

The Photoshop-Style Curve Editor is a precision tone-shaping node for ComfyUI, designed for artists who need predictable, photographic-grade control over colour and contrast.

It brings the familiar Photoshop RGB curve workflow into ComfyUI — with proper UI handles, real-time updates, channel-specific editing and clean interpolation math that produces stable, repeatable results. The goal is simple:

proper colour control without hacky workarounds, broken spline math or messy node chains.

🎛️ What the Curve Editor Does

The Curve Editor is built for accurate, production-quality colour correction, giving you the tools needed to refine imagery during look-dev, style matching, animation passes, or batch processing.

It lets you adjust:

• Master curve (RGB combined)
• Individual Red, Green and Blue channels
• Shadow, midtone and highlight shaping
• Contrast, rolloff and micro-tone balance
• Colour cohesion across sequences

All without introducing artefacts, banding, clipped colour or gamma issues.

🧩 Key Features

1. True Photoshop-style Curves

Uses proper Bezier interpolation so curve behaviour matches Photoshop: smooth, predictable and stable.

2. Visual UI for Real-Time Editing

A custom interactive curve editor allows you to drag points, switch channels, preview responses, and view all RGB curves at once.

3. Channel-Specific Colour Grading

Fine-tune tone and colour with dedicated R, G and B curve control — ideal for realistic grading or stylised looks.

4. High-Fidelity Image Processing

The transform is applied in linearised colour space to avoid banding, posterisation and inconsistent gamma.

5. Batch-Friendly & Production Ready

Built for large sequences, predictable across multiple frames, and fully supports preset loading from JSON files.

🗂️ Why This Node Exists

Most curve tools inside AI pipelines are unstable, lack UI, or behave inconsistently across renders. This node solves that by introducing a proper photographic curve system designed for real production, not novelty effects.

📦 What’s Included

• Photoshop-style curve UI
• RGB + Master channel editing
• Preset save/load with JSON
• Overlay display of all RGB curves
• Accurate tone-mapping implementation
• Complete ComfyUI integration
• Preset directory auto-loading

🔧 How It Fits Into Your Workflow

Look Development

Shape tone and mood to match a project’s artistic direction.

Photo-Real Enhancement

Micro-contrast, crisp shadows, super-controlled highlights.

Sequence Grading

Consistent look across hundreds or thousands of frames.

Stylised Art & Film Looks

Film curves, teal/orange, soft fades, analog tone shaping.

Prompt-Agnostic Cleanup

Fix images without regenerating — ideal for refining AI outputs without touching prompts.

📝 Supported Presets

The plugin includes a variety of grading presets:

• Clean Contrast
• Soft Film Curve
• Medium S-Curve
• High-Contrast Punch
• Colour Boost
• HDR-Style Roll-Off
• Cinematic Neutral
• Warm Lift
• Cool Shadows

🧪 Development & Roadmap

• Luma curve (optional toggle)
• Histogram preview
• Shared curves between nodes
• Masking per channel
• Advanced batch processing options

📥 Want Early Access?

If you’re interested in early builds, beta features or internal R&D tools, reach out to be added to the testing group.