<h3 id="overview">Overview</h3>This ComfyUI workflow is a powerful visual analysis tool for comparing how different CFG values, samplers, and schedulers affect your output — all in one automated run. It generates labeled CFG grids using loop logic and produces a clean, organized image sheet for rapid evaluation. Perfect for testing new models, tuning consistency, and identifying the exact CFG “sweet spot” for your chosen checkpoint.You can run:<ul><li>Grid 1 only</li><li>Grid 2 only</li><li>or both simultaneously for side-by-side testing</li></ul>Each grid can have its own sampler, scheduler, seed, and CFG range, or you can sync them together.The workflow supports:<ul><li>Configurable CFG range (e.g., 4 → 16, or any range you choose)</li><li>Automatic text overlay on each tile (ex: “CFG: 3”)</li><li>Optional dual-grid output (Grid 1 &amp; Grid 2)</li><li>Completely dynamic Sampler &amp; Scheduler selection</li><li>Auto-saving with metadata tokens in file names</li><li>Support for any SDXL/SD1.5 checkpoint</li><li>Seed locking for consistency across all CFG values</li></ul>Great for:<ul><li>Finding the best CFG for a new model</li><li>Comparing samplers</li><li>Testing schedulers</li><li>Understanding model behavior at low vs high CFG</li><li>Building consistency pipelines for animation or character work</li></ul><hr /><h3 id="what-this-workflow-does">What This Workflow Does</h3>For each CFG value in your range:<ol><li>Runs a clean KSampler pass</li><li>Applies text overlay indicating the CFG</li><li>Places the result into a batch</li><li>Builds a final grid preview</li><li>Saves each image with metadata-rich filenames</li></ol>All results come from:<ul><li>The same seed</li><li>The same latent</li><li>The same prompt</li><li>Only CFG changes</li></ul>This produces a perfectly controlled comparison panel.<hr /><h3 id="key-features">Key Features</h3>Dynamic CFG Range<ul><li>Loop-based iteration</li><li>Auto-incrementing CFG via math expression</li><li>Works with any sampler &amp; scheduler combo</li><li>No hardcoded values — completely flexible.</li></ul>Use:<ul><li>FROM CFG #: starting point</li><li>UP TO CFG #: ending point.</li></ul>Example: Set FROM = 1, TO = 9 → you get CFG 1 through 9 automatically generated.Smart Text OverlayEach tile automatically displays:<ul><li>“CFG: #”</li></ul>Uses CR Overlay Text for clean, sharp rendering.Labels are dynamically generated inside the loop, matching the exact CFG value used. (You can adjust color and size.)Dual Independent GridsYou can:<ul><li>Enable Grid 1</li><li>Enable Grid 2</li><li>Or run both grids (each with independent samplers/schedulers)</li></ul>You can use this to run true A/B testing:<ul><li>Comparing two different samplers &gt; ex: Euler vs DPM++</li><li>Comparing two different schedulers &gt; ex: Karras vs Simple</li><li>Compare how seed affects CFG output</li></ul>Metadata-Rich SavingUsing the Image Saver extension, filenames can include:<ul><li><code>%time</code></li><li><code>%cfg</code></li><li><code>%model_name</code></li><li><code>%sampler_name</code></li><li><code>%scheduler_name</code></li><li><code>%seed</code></li><li>And more</li></ul>Example output:22-24-21-perfectdeliberate_v40-cfg(3.0)-dpmpp_3m_sde-simple-79.png Required Node PacksThis workflow uses the following custom nodes:<ul><li>Boyo Nodes (ForLoopStart / ForLoopEnd)</li><li>rgthree Nodes (KSampler Config, Any Switch)</li><li>Comfyroll Custom Nodes (CR Overlay Text)</li><li>WAS Node Suite (Text Concatenate, Image Batch)</li><li>JK ComfyUI Helpers (AnythingToString)</li><li>ComfyUI Image Saver (for detailed filenames)</li><li>ComfyUI Easy Use (included — seed node)</li></ul>If you use ComfyUI-Manager, simply install these via: Manager → Installed → Search the package → Install Below is a quick start guide, followed by a detailed step-by-step list. How to Use - Quick Start:<ol><li>Choose your checkpoint</li><li>Set prompts (positive &amp; negative)</li><li>Hit Run</li></ol>How to Use - Full List<ol><li>Choose your checkpoint</li><li>Set your latent size</li><li>Set prompts (positive &amp; negative)</li><li>Choose sampler &amp; scheduler</li><li>Choose seed</li><li>Set “Generate up to CFG #”</li><li>Press Queue Prompt</li></ol>After generation:<ul><li>Preview grid appears in Comfy</li><li>Images are saved automatically</li><li>Filenames include CFG + metadata</li></ul><h3 id="notes">Notes</h3><ul><li>Batch size must stay at 1 (important for proper CFG isolation)</li><li>Text overlay position can be changed in the CR Overlay Text node at each grid's side.</li><li>You can bypass saving or preview nodes depending on your needs</li><li>Two grids allow true A/B testing of sampler configurations</li></ul>

ComfyUI CFG Sweep Analyzer – Dynamic CFG Range, Grid Preview, Text Overlay, Save Metadata

Initial Release:This workflow provides a complete CFG analysis tool for ComfyUI, including:• Dynamic CFG range controls (FROM → UP TO)• Automatically labeled CFG tiles (“CFG: #” text overlay)• Dual-grid mode for A/B comparison of samplers, schedulers, seeds, or LoRAs• Clean organized layout with instructional Notes• Metadata-rich file saving using %cfg, %sampler_name, %scheduler_name, and %seed• Optional Power LoRA Loader section• Works with any SDXL or SD1.5 checkpointThis is the first public release of the workflow.

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