ComfyUI YSC HighRes-Fix

A custom node for ComfyUI designed to simplify the "High-Resolution Fix" process. This node takes an input image, performs a direct upscale, and then re-encodes it into a latent image, preparing it for a final sampling pass to add details.

What It Does

This node replicates the functionality of a high-resolution fix pipeline. Instead of just resizing an image, it intelligently upscales it and then uses a diffusion sampling process (denoising) to add fine details that are consistent with the original image's content.

How It Works

The node's operation is straightforward:

1. Image Input: You provide a low-resolution image (e.g., the output of your initial generation).
2. Brute Upscale: The node applies a simple, direct upscale to the image to increase its dimensions.
3. Latent Encoding: This larger, upscaled image is then encoded back into the latent space.
4. Latent Output: The node outputs this new, larger latent image.

This output latent is then ready to be passed to a KSampler node (or similar) with a low-to-moderate denoising strength. This final sampling step is where the new details are "painted" onto the upscaled image.

How to Use (Example Workflow)

1. Generate your initial image (e.g., 512x512) as you normally would.
2. Connect the output image from your VAE Decode node to the image input of the YSC HighRes-Fix node.
3. Connect the LATENT output from the YSC HighRes-Fix node to the latent_image input of a second KSampler node.
4. Connect your model, positive prompt, and negative prompt to this second KSampler.
5. Crucially, set the denoise on this second KSampler to a value like 0.3 to 0.55. This value controls how much detail is added.
6. Connect the LATENT output of this KSampler to a final VAE Decode node to get your high-resolution image.

Inputs

• image: The source image (from a VAE Decode or Load Image node) that you want to upscale and refine.

Outputs

• LATENT: The upscaled and re-encoded latent image, ready for a final sampling (denoising) pass.

Installation

1. Navigate to your ComfyUI/custom_nodes/ directory.
2. Clone this repository:

   git clone [https://github.com/yannickcruz/ComfyUI-YSC-HighResFix.git](https://github.com/yannickcruz/ComfyUI-YSC-HighResFix.git)
   

   (Replace the URL with your actual repository URL)
3. Alternatively, download the .py files from this repository and place them directly in the ComfyUI/custom_nodes/ directory.
4. Restart ComfyUI.