ComfyUI Extension: Olm Sketch for ComfyUI

ComfyUI-Olm-Sketch Introduction

ComfyUI-Olm-Sketch is an innovative extension designed for ComfyUI, a powerful visual AI engine. This extension provides an interactive sketching and drawing node that supports stylus and pen input, allowing you to create and manipulate sketches directly within your workflows. It is particularly useful for AI artists who work with ControlNet-style workflows, which often require the use of scribbles and line art. By integrating drawing capabilities directly into ComfyUI, Olm-Sketch eliminates the need to switch between different applications, streamlining your creative process and enabling quick iterations and adjustments.

How ComfyUI-Olm-Sketch Works

At its core, ComfyUI-Olm-Sketch functions as a node within the ComfyUI environment. Imagine it as a digital canvas embedded in your workflow, where you can draw and modify images without leaving the interface. This node allows you to sketch freehand or use various tools to create shapes and lines. The extension is designed to be intuitive and responsive, providing immediate visual feedback as you work. This means you can see the impact of your changes in real-time, making it easier to refine your ideas and achieve the desired artistic effect.

ComfyUI-Olm-Sketch Features

ComfyUI-Olm-Sketch is packed with features that enhance your drawing experience:

• Interactive Drawing UI: Offers freehand drawing and line tools, including a dashed line preview. You can also draw rectangles and ellipses, with options to fill them.
• Image Tools: Includes functionalities to flip images horizontally or vertically, rotate them by 90 degrees, invert colors, crop using numeric inputs, apply blur effects, and offset images.
• Flexible Brush System: Customize your brush with stroke widths ranging from 1 to 1024 pixels. Adjust alpha opacity for blending effects and choose from various blend modes like multiply, screen, and overlay.
• Color Picker: Provides RGB, HEX, and HSV color inputs, along with an eyedropper tool to sample colors directly from your canvas.
• Image Handling: Upload existing images into the node without needing to evaluate the graph. Save your sketches to a designated output folder for easy access.
• Smart UX: The canvas is responsive and adjusts in real-time. The node auto-resizes to match the image size, supporting resolutions up to 2048x2048 pixels, with plans for 4K support in future updates.
• Persistence: Your images are saved automatically and can withstand UI and backend restarts. Temporary sketches are stored in a cache and managed efficiently to prevent clutter.

ComfyUI-Olm-Sketch Models

Currently, ComfyUI-Olm-Sketch does not include different models. It focuses on providing a robust and flexible drawing environment within ComfyUI.

What's New with ComfyUI-Olm-Sketch

The latest updates to ComfyUI-Olm-Sketch include:

• A more modular code structure to support future features and improve maintainability.
• New custom modular confirmation modals and input elements.
• A canvas offset tool with wraparound and a simple radius-based blur tool.
• Enhanced mouse event handling and improved canvas interaction states.
• Better button UX with hover and click states, improved input validation, and dynamic node resizing to reduce UI glitches. These updates enhance the user experience by making the interface more intuitive and responsive, allowing for smoother and more efficient creative workflows.

Troubleshooting ComfyUI-Olm-Sketch

Here are some common issues and solutions:

• Undo/Redo Support: Currently, there is no built-in undo/redo functionality. Consider saving your work frequently to avoid losing progress.
• Resolution Limit: The extension supports up to 2048x2048 pixels. If you need higher resolutions, keep an eye out for future updates.
• Layer Support: This is a lightweight sketch node, so it does not support layers like a full painting suite.
• Pen Support: Wacom styluses are supported, but some features like pressure sensitivity may not work if Windows Ink is disabled. If the pen controls fail, try mapping the click function to a button.

Learn More about ComfyUI-Olm-Sketch

To further explore ComfyUI-Olm-Sketch, you can visit the GitHub repository for more detailed documentation and updates. Additionally, the ComfyUI community is a great place to ask questions, share your work, and connect with other AI artists. For tutorials and examples of what you can achieve with ComfyUI, check out the ComfyUI Examples. These resources will help you get the most out of ComfyUI-Olm-Sketch and enhance your creative projects.