An all-in-one, multi-pass generative upscaling and post-processing node designed to simplify complex workflows and add a professional finish to your images.

This node replaces a complex chain of 10+ nodes, combining a latent refine pass, two generative tiled upscale passes, and a final Post-FX (Sharpen & Grain) stage into a single, convenient, and collapsible unit.

🌟 Features

All-in-One Pipeline: A single node to take your image from 1K to 4K+ with generative details, sharpening, and realistic film grain.
Dynamic & Collapsible UI: Tidy up your workflow! Each major pass can be toggled on or off, hiding its settings to save space.
Multi-Pass Upscaling:
- Pass 1: Latent Refine: A subtle img2img-style pass to refine the base image before the main upscale.
- Pass 2 & 3: Tiled Generative Upscale: Two independent generative (img2img) passes that use tiling to perform large upscales (e.g., 2x + 2x) on low-VRAM GPUs.
Professional Post-FX Stage:
- Frequency-Split Sharpening: A high-quality sharpening method (scipy.ndimage.gaussian_filter) that sharpens details without introducing harsh halos.
- Realistic Film Grain: Adds poisson, gaussian, or perlin grain to break up digital smoothness, add texture, and make images feel more realistic and less "plastic."
Global Seed Control: A single, globally accessible seed controls all three generative passes, ensuring consistent and reproducible results.

⚙️ Node Parameters (The Pipeline)

The node is organized into sections that follow the image processing pipeline.

1. Latent Pass (Pass 1)

Purpose: A gentle, non-tiled img2img pass.
Use Case: Ideal for slightly modifying or refining the base image before the main upscale. Uses a low denoise (e.g., 0.4) and a small upscale_by (e.g., 1.1x).

2. Tiled Pass 2 (Pass 2)

Purpose: The primary generative upscale pass.
Use Case: This is your main 2x or 3x upscale. It uses tiling, so you can use large tile_size (like 768) with low VRAM. A moderate denoise (e.g., 0.35) will add generative details.

3. Tiled Pass 3 (Pass 3)

Purpose: A second, optional generative upscale pass.
Use Case: Use this for a 4x > 8x upscale. It takes the output of Pass 2 and tiles it again. Typically, this pass uses a much lower denoise (e.g., 0.15) to refine details without changing the image.

4. Post-FX (Pass 4)

This stage is applied in pixel-space at the very end.

Enable Sharpen:
- Amount: Strength of the sharpening effect.
- Radius: How wide the detail-detection radius is.
Enable Grain:
- Grain Intensity: The overall strength/visibility of the grain.
- Grain Type: poisson (default, very organic), gaussian, or perlin.
- Grain Size: The scale of the grain particles.
- Saturation Mix: How colorful the grain is (1.0 = full color, 0.0 = monochrome).
- Adaptive Grain: Ties the grain strength to the image's brightness (more grain in shadows).

5. Global Seed

Purpose: Controls all three generative passes (Pass 1, 2, and 3) simultaneously for consistent results.
Features: Includes the standard ComfyUI fixed, increment, randomize controls.