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ComfyUI: Building a K Sampler and Checkpoint Node Setup

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Demo summary

The creator demonstrates starting a blank workflow and connecting a K Sampler node to a Load Checkpoint node using the node-based drag-and-drop interface.

Step-by-step

  1. Create a blank workflow by clicking the plus icon in the main menu
  2. Double-click anywhere on the empty canvas to open the quick search bar
  3. Type 'K sampler' in the search bar and select it from the list
  4. Click and drag from an input connection point on the left of the K sampler node into empty space
  5. Select 'Load Checkpoint' from the filtered pop-up menu to create and connect the node
  6. Click the dropdown menu on the Load Checkpoint node to select your downloaded model

Options

  • Search for nodes via the quick search bar
  • Connect nodes by dragging from connection points to open a filtered compatible node list

Watch out for

  • Workflows must flow from left to right (inputs on the left, outputs on the right)
  • Incompatible data types cannot be connected (e.g., yellow CLIP outputs cannot connect to orange inputs)
  • You must have a model downloaded and installed to select it in the Load Checkpoint node

Tips

  • Use the color-coding on connection points to identify compatible nodes (e.g., Lavender for models)
  • Think of nodes like programming functions that perform specific jobs in a sequence

Highlights

“making it simple to spot which nodes can connect”

All demos from “ComfyUI for Beginners Pt. 1: Installation, Interface & Your First SDXL Workflow”

  1. 4:071:10Install ComfyUI and Manager with Stability MatrixThe video demonstrates how to use the Stability Matrix launcher to install ComfyUI in portable mode and add the ComfyUI Manager extension via the package menu.ComfyUIAI Image Generator
  2. 6:504:15ComfyUI Interface and Sidebar NavigationA walkthrough of the ComfyUI interface, including the main menu, Q panel for tracking generations, model library, and the canvas tools for node navigation.ComfyUIAI Image Generator
  3. 11:472:24Building a K Sampler and Checkpoint Node SetupCurrentThe creator demonstrates starting a blank workflow and connecting a K Sampler node to a Load Checkpoint node using the node-based drag-and-drop interface.ComfyUIAI Image Generator
  4. 14:130:45Download SDXL Models via Stability Matrix BrowserThe demo shows how to use the built-in CivitAI integration in Stability Matrix to browse, filter for SDXL 1.0 checkpoints, and download them directly to the shared models folder.Stability MatrixAI Image Generator
  5. 16:374:03Completing a Text-to-Image Workflow in ComfyUIThe video shows the step-by-step connection of CLIP Text Encode nodes for prompts, Empty Latent Image for resolution, VAE Decode, and the Save Image node to complete a functional pipeline.ComfyUIAI Image Generator
  6. 21:100:42Running an AI Image GenerationThe user enters a prompt and clicks 'Run', demonstrating how ComfyUI highlights active nodes with a green border as it processes the image through the pipeline.ComfyUIAI Image Generator
  7. Watch “ComfyUI for Beginners Pt. 1: Installation, Interface & Your First SDXL Workflow” →

AI Image Generator

  1. 1:560:39Load a text-to-image workflow and download missing modelsThe user demonstrates how to load a default text-to-image template in ComfyUI and use the 'show missing models' feature to download required AI checkpoints.Kevin Stratvert
  2. 4:110:29Manage generated assets in ComfyUIThe presenter demonstrates how to access the assets panel using the 'A' shortcut to view, save, or delete previously generated images.Kevin Stratvert
  3. 15:005:45Generate image with Hermes Agent and ComfyUIThe host uses the Hermes Agent TUI to request a 1024x1024 image of a tree using the Zimage Turbo model, which the agent executes by generating and running a ComfyUI workflow.ComfyUI
  4. 6:420:59Configure Gemma 2B Text Encoder in ComfyUIThe creator shows how to load the Gemma 2B text encoder model into the ComfyUI workflow and select it from the node dropdown menu.AI Search
  5. 4:270:30Copying and replacing prompts in ComfyUIThe user demonstrates a custom node feature that allows hovering over prompt examples to copy and then replace the current prompt in the workflow with a single click.pixaroma
  6. 13:030:51Managing node colors with PixaRoma nodesThe video demonstrates UI updates for PixaRoma nodes in ComfyUI, including selecting color swatches, copying/pasting colors between nodes, and setting favorite colors.pixaroma
  7. 4:150:35Launch ComfyUI on WindowsThe creator demonstrates how to launch the portable version of ComfyUI by running the 'run_nvidia_gpu' batch file and accessing the interface via a web browser.WINBUSH
  8. 10:071:30Browse and load ComfyUI templatesThe creator demonstrates how to navigate the templates menu, filter for local models, and load a Flux 2 image generation workflow.WINBUSH
  9. 0:000:33Configuring MSR mode in LTX DirectorThe user demonstrates setting up the Director node in ComfyUI for MSR (Multiple Subject Reference) mode, including bypassing clean latent slices and enabling the MSR LoRA.RedShade
  10. 5:090:19Loading LTX Director V5 workflow templateThe video shows how to search for and load the LTX Director V5 template within ComfyUI and input prompts for character generation.RedShade
  11. 4:251:21Iterative rerolling at specific generation stagesThe video shows how to use the 'reroll' button at specific stages of the workflow to change motion or visual quality without re-generating the initial seed samples.Fox•Fur•Essence Films
  12. 9:173:04Install ComfyUI using Easy InstallThe instructor demonstrates how to download the ComfyUI Easy Install zip from GitHub, extract it, and run the BAT file to set up a portable local installation.pixaroma
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