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__init__.py
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nodes_camera.py
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nodes_color_management.py
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nodes_depth.py
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nodes_dna.py
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nodes_exr.py
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nodes_filmgrain.py
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nodes_grade.py
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nodes_hdr.py
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nodes_help.py
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nodes_io_extra.py
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nodes_loader.py
nodes_loader.py
 
 
nodes_lut.py
nodes_lut.py
 
 
nodes_prompt.py
nodes_prompt.py
 
 
nodes_radiance_viewer.py
nodes_radiance_viewer.py
 
 
nodes_resolution.py
nodes_resolution.py
 
 
nodes_sampler.py
nodes_sampler.py
 
 
nodes_upscale.py
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pyproject.toml
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requirements.txt
requirements.txt
 
 

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RADIANCE

Version License ComfyUI GPU

Professional HDR Image Processing Suite for ComfyUI

Industry-grade color grading, film effects, and HDR processing

Installation - Node Reference - Features - Documentation

Features

  • Professional HDR Processing - 32-bit floating-point pipeline
  • Film Effects - 30+ camera sensors, 20+ film stocks
  • Industry Scopes - Histogram, Waveform, Vectorscope
  • GPU Accelerated - 10-50x faster with CUDA
  • Pro Viewer - Flame/Nuke-style interactive viewer
  • Camera Simulation - White balance, lens effects, presets
  • EXR/HDR Support - Full OpenEXR read/write
  • Unified Loading - Simplified model loading workflow

Installation

Option 1: ComfyUI Manager (Recommended)

  1. Open ComfyUI Manager
  2. Search for "radiance"
  3. Click Install

Option 2: Git Clone

cd ComfyUI/custom_nodes
git clone https://github.com/FXTDStudio/radiance.git
pip install -r FXTDStudio_Radiance/requirements.txt

Option 3: Manual Download

  1. Download the latest release
  2. Extract to ComfyUI/custom_nodes/radiance
  3. Install dependencies: pip install -r requirements.txt

Node Categories

Category Nodes Description
HDR 24 Professional HDR processing
Viewer 7 Scopes and analysis tools
Film 5 Film grain and effects
Upscale 7 Professional upscaling
EXR 3 OpenEXR file support
Camera 3 Camera simulation
Sampler 2 Flux-optimized sampling
Prompt 3 Prompt engineering
Loader 1 Unified model loader

Total: 55 Nodes

Example Workflow

Example Workflow

Quick Start

Basic HDR Workflow

Image -> ImageToFloat32 -> Float32ColorCorrect -> HDRToneMap -> SaveImageEXR

Film Look Workflow

Image -> FXTDFilmGrain -> FXTDLensEffects -> FXTDFilmLook -> Output

Pro Viewer Setup

Image -> Radiance Pro Viewer (FXTD)

Then use keyboard shortcuts: F fit, 1 100%, H histogram, W waveform, V vectorscope

Pro Viewer Shortcuts

Key Action
F Fit to view
1 100% zoom
R/G/B View channel
L Luminance
C RGB (color)
H Toggle histogram
W Toggle waveform
V Toggle vectorscope
E False color
Z Zebra pattern
A A/B comparison
P Fullscreen

HDR Nodes

Image Processing

Node Description
Image to Float32 Convert to 32-bit floating point
Float32 Color Correct Professional color correction
HDR Expand Dynamic Range Increase dynamic range
HDR Tone Map 10+ tone mapping operators
GPU HDR Tone Map GPU-accelerated tone mapping

Log Curves

Node Description
Log Curve Encode ARRI LogC3/4, S-Log3, V-Log, ACEScct
Log Curve Decode Decode log footage to linear

Color Spaces

Node Description
Color Space Convert sRGB, ACEScg, Rec.2020, XYZ
ACES 2.0 Output Transform Full ACES 2.0 pipeline
DaVinci Wide Gamut DWG color space
ARRI Wide Gamut 4 AWG4 color space
OCIO Color Transform OpenColorIO integration

HDR Tools

Node Description
HDR Exposure Blend Mertens, Laplacian pyramid
Shadow/Highlight Recovery Lift shadows, recover highlights
HDR Histogram HDR-aware histogram analysis
LUT Apply Apply 3D LUTs (.cube, .3dl)

Export

Node Description
Save EXR (32-bit) OpenEXR export
Load EXR OpenEXR import
Save 16-bit PNG/TIFF 16-bit export
Save HDRI HDR environment map
HDR 360 Generate 360 HDRI generation

Film Effect Nodes

Node Description
FXTD Film Grain Photorealistic grain simulation
FXTD Grain Advanced Fine-grained control
FXTD Lens Effects Halation, bloom, chromatic aberration
FXTD Film Look Complete film emulation
FXTD Pro Film Effects All-in-one film processing

Camera Presets

RED, ARRI ALEXA, Sony Venice, Blackmagic URSA, Canon C300, Panasonic Varicam

Film Stock Presets

Kodak Vision3 250D/500T, Kodak Portra 400/800, Fuji Eterna, Ilford HP5, CineStill 800T

Upscale Nodes

Node Description
FXTD Pro Upscale Professional Lanczos/Mitchell
FXTD Upscale By Size Target resolution upscaling
FXTD Upscale Tiled Large image tile processing
FXTD AI Upscale RealESRGAN, SUPIR models
FXTD Sharpen 32-bit GPU-accelerated sharpening
FXTD Downscale 32-bit Anti-aliased downscaling
FXTD Bit Depth Convert Dithered bit depth conversion

Viewer Nodes

Node Description
FXTD Master Viewer Comprehensive image viewer
FXTD Scope Viewer Histogram, waveform, vectorscope
FXTD Pixel Sampler Color picker with HDR values
Radiance Grade (FXTD) GPU-accelerated color grading
Radiance Viewer (FXTD) Fast preview with scopes
Radiance Pro Viewer (FXTD) Industry-level interactive viewer
Radiance Pro Viewer Advanced Full analysis features

Sampler Nodes

Node Description
Radiance Sampler (FXTD) Flux-optimized sampler
Radiance Sampler Pro (FXTD) Advanced sampling control

Flux Features

  • Native sigma shifting for high-res detail
  • Integrated guidance control
  • Optimized Euler + Simple scheduler

Camera Nodes

Node Description
White Balance Temperature/tint adjustment
Camera Simulation Sensor characteristics, presets
Lens Simulation Lens aberrations, vignette, distortion

Prompt Nodes

Node Description
Cinematic Prompt Machine Cinematic prompt generator
Simple to Flux Convert simple prompts for Flux
Prompt Presets Saved prompt templates

Loaders

Node Description
Radiance Unified Loader Single node for Checkpoint, CLIP, VAE

External Models

Depth Anything V2

The node will automatically download models from HuggingFace to models/depth_anything.

  • Small: Fast, good for video
  • Base: Balanced
  • Large: Best quality

AI Upscale Models

  • RealESRGAN: x2/x4 upscaling (Standard & Anime)
  • SUPIR: High-fidelity restoration (v0Q, v0F)

GPU Acceleration

All critical operations are GPU-accelerated with automatic CPU fallback:

Operation GPU Speedup
Tone Mapping 20-50x
Log Curves 20x
Color Grading 25x
Histogram 10x
Waveform 10x
Gaussian Blur 20x
LUT Application 10x

External Libraries

Radiance is built on industry-standard open source libraries:

Documentation

Contributing

We welcome contributions from the community! Whether it's adding new features, fixing bugs, or improving documentation, your help is appreciated.

Please check our Contributing Guide for details on how to submit pull requests, report issues, and code of conduct.

License

GPL-3.0 License - See LICENSE

Credits

Core Technology

  • ComfyUI Architecture
  • PyTorch (GPU Acceleration)
  • OpenCV & OpenEXR
  • Pillow (Image I/O)
  • NumPy

Color Science & Algorithms

  • ACES Color System: Academy of Motion Picture Arts and Sciences
  • Filmic Tone Mapping: John Hable (Uncharted 2), Stephen Hill, and Krzysztof Narkowicz
  • AgX Color Transform: Troy Sobotka
  • Reinhard Tone Mapping: Erik Reinhard
  • Color Math: Colour-Science for Python
  • 3D LUT Processing: Standard .cube format (Adobe/DaVinci)

Camera & Film Emulation

  • Digital Cinema Cameras: ARRI (Alexa 35, ARRI IMAX), RED (V-Raptor, Komodo), Sony (Venice 2, FX6), Blackmagic (Pocket 4K/6K), Canon (C70, R5C), Panavision (DXL2)
  • Log Curves: ARRI (LogC3/C4), Sony (S-Log3), RED (Log3G10), Panasonic (V-Log), Canon (Log3)
  • Film Stocks: Kodak Vision3 (500T, 250D, 50D, 200T), Fujifilm Eterna (500T, Vivid), Kodak Ektachrome
  • Lens Presets: Panavision C-Series, Cooke Anamorphic/i, Zeiss Supreme Prime, Canon K35, Lomo Round Front
  • ARRI Textures: ARRI Look Library compatible grain/halation characteristics

AI Models

  • Depth Estimation: Depth Anything V2 (HuggingFace Transformers)
  • Upscaling: RealESRGAN, SUPIR

Viewer Technology

  • JavaScript Canvas API
  • WebGL (planned)
  • HiDPI/Retina rendering

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©FXTD Studios

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Industry-Grade Color Science · GPU Accelerated

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