ComfyUI.org

Convert Sketches to Stunning Art: A Step-by-Step Guide

CN
ComfyUI.org
2025-04-24 08:49:06

1. Workflow Overview

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This "Doodle Art Master" workflow converts sketches into detailed illustrations with:

  • Sketch coloring & detailing

  • Two-phase generation (base + upscale)

  • Multi-style support via model switching

2. Core Models

  • Main Model: WildCardX-XL Fantasy

  • ControlNet: Scribble-optimized for SDXL

  • Upscaler: 4x-AnimeSharp for anime-style

3. Key Nodes

Node

Function

Installation

LatentUpscaleBy

2x latent space enlargement

Built-in

Image Comparer

Before/after visual comparison

rgthree-comfy extension

Dependencies:

  • Input sketch (e.g., 1152x648 PNG)

  • ae.sft VAE model required

4. Pipeline Stages

Stage 1: Sketch Processing

  • Load doodle image

  • Apply scribble ControlNet (0.85 strength)

Stage 2: Base Generation

  • dpmpp_sde_gpu sampler (20 steps)

  • Output 768x512 image

Stage 3: HD Refinement

  • 2x latent upscale → 1536x1024

  • UltimateSD upscaling with redraw

5. I/O Specification

  • Inputs:

    • Hand-drawn sketch (B/W preferred)

    • Positive prompt (e.g., "woman on viewing platform")

  • Output:

    • HD illustration (saved to ComfyUI)

6. Critical Notes

⚠️ Requirements:

  • 8GB+ VRAM for SDXL

  • Adjust negative prompts for artifact control

🔧 Pro Tips:

  • Set ControlNet stop_at to 0.65 for balance

  • Enable tile overlap in UltimateSD for seamless upscale

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