ComfyUI Multi Prompt Generator

Generate multiple images from a prompt list in a single run, with built-in upscaling and LUT support.

Features

• Batch Generation — Input a list of prompts (one per line), generate all at once
• Auto Upscaling — 2-pass upscale with model upscaler + img2img refinement
• 64x Alignment — Automatically adjusts dimensions to prevent edge artifacts
• LUT Support — Apply .cube LUT files with adjustable strength
• Live Preview — See results during generation (toggleable)
• Auto Save — Images saved with auto-numbered filenames based on first tag

Installation

Option 1: ComfyUI Manager (Coming Soon)

Search for "Multi Prompt Generator" in ComfyUI Manager.

Option 2: Manual Install

cd ComfyUI/custom_nodes
git clone https://github.com/mrm987/ComfyUI_Multi_Prompt_Generator.git

Restart ComfyUI.

Usage

1. Search for "Multi Prompt Generator" in the node menu
2. Connect: Model, CLIP, VAE, Empty Latent, (optional) Upscale Model
3. Set your base prompt and negative prompt
4. Enter prompt list — one variation per line:

smile, happy, bright eyes
angry, furrowed brow, clenched teeth
sad, downcast eyes, closed mouth
crying, tears, watery eyes

Inputs

Input	Type	Description
model	MODEL	Checkpoint model
clip	CLIP	CLIP model
vae	VAE	VAE model
latent	LATENT	Empty latent image
base_prompt	STRING	Base prompt (combined with each line)
negative_prompt	STRING	Negative prompt
prompt_list	STRING	One prompt variation per line
seed	INT	Random seed
steps	INT	Sampling steps (default: 30)
cfg	FLOAT	CFG scale (default: 5.0)
enable_upscale	BOOL	Enable 2-pass upscaling (default: True)
enable_preview	BOOL	Show preview during generation (default: True)
save_prefix	STRING	Output folder name (default: "MultiPrompt")

Optional Inputs

Input	Type	Description
upscale_model	UPSCALE_MODEL	Upscale model (e.g., 2x-AnimeSharp)
scale_factor	FLOAT	Downscale after upscale (default: 0.7)
upscale_steps	INT	2nd pass steps (default: 15)
upscale_cfg	FLOAT	2nd pass CFG (default: 5.0)
upscale_denoise	FLOAT	2nd pass denoise (default: 0.5)
lut_name	COMBO	LUT file from comfyui-propost/LUTs
lut_strength	FLOAT	LUT intensity (default: 0.3)

Output

Images are saved to:

output/[save_prefix]/01_smile_00001.png
output/[save_prefix]/02_angry_00001.png
output/[save_prefix]/03_sad_00001.png
...

Filename format: [index]_[first_tag]_[counter].png

Pipeline

For each prompt line:
  1. Combine: base_prompt + line
  2. KSampler (1st pass)
  3. Preview (if enabled)
  4. Upscale Model → Resize to 64x → KSampler (2nd pass)
  5. Apply LUT (if selected)
  6. Preview update (if enabled)
  7. Save

Requirements

• ComfyUI
• (Optional) comfyui-propost for LUT files

License

MIT