This repository provides ComfyUI nodes for the Ultimate Stable Diffusion Upscale script, a popular tool for enhancing image resolution. It targets ComfyUI users seeking to integrate advanced upscaling capabilities directly into their Stable Diffusion workflows, offering a more streamlined and flexible approach compared to external scripts.

How It Works

The nodes wrap Coyote-A's Ultimate SD Upscale script, enabling its functionality within the ComfyUI node-based interface. It supports the core upscaling process, including options for custom samplers and sigmas, and introduces parameters like upscale_by for direct scaling factor control. The force_uniform_tiles option addresses potential tiling artifacts by ensuring consistent tile sizes, mirroring the behavior of the original A1111 extension.

Quick Start & Requirements

• Install via git clone https://github.com/ssitu/ComfyUI_UltimateSDUpscale --recursive within the ComfyUI/custom_nodes/ directory.
• Requires ComfyUI and its dependencies.
• Nodes are accessible under image/upscaling.
• Further parameter details are available at https://github.com/Coyote-A/ultimate-upscale-for-automatic1111.

Highlighted Details

• Offers three distinct nodes: Ultimate SD Upscale, Ultimate SD Upscale (No Upscale), and Ultimate SD Upscale (Custom Sample).
• Includes upscale_by parameter for direct resolution multiplication.
• force_uniform_tiles option to mitigate tiling artifacts.
• Supports custom samplers and sigmas for advanced control.

Maintenance & Community

• The project is maintained by ssitu.
• No specific community links (Discord/Slack) or roadmap are provided in the README.

Licensing & Compatibility

• The repository does not explicitly state a license.
• Compatibility with commercial or closed-source projects is undetermined without a specified license.

Limitations & Caveats

The README does not specify a license, which may impact commercial use. There is no explicit mention of tested compatibility with different ComfyUI versions or hardware configurations.