ComfyUI Projects

A collection of custom ComfyUI workflows and nodes created by Fred LeFevre.

Clone this repo into your comfyui folder.

Projects Included

🧩 Custom Nodes: Comfyui_FSL_Nodes

• manual_alpha_mask_painter.py
  Custom node to manually convert black mask areas into alpha transparency. Useful with GRIPTAPE when inpainting and creating the mask by right clicking on the loaded image and select load mask editor. Griptape requires an alpha channel mask.
• 8WayImgSwitch Image switch with eight inputs
• fsl_composite_with_mask_cropped.py Designed to remove the Alpha Channel But Keep Transparent Parts as Background Color (not currently used)
• fsl_save_and_strip_alpha Strips alpha channel from RGBA image. (not currently used)
• FSLGeminiGenerateImageV6.py Allows for the use of Gemini API's to create image. This node also provide for whether or not the preceding image is used for iterative generation.
• fsl_image_memory.py Provides 4 nodes. Image Memory Store and Image Memory Recall stores an image to the key entered in the 'key' field. Image memory recall recalls the image for subsequent use. Image Memory Clear is used to delete the stored image based on the entered key. Image Memory Clear All clears all keys that have been entered.
• fsl_prompt_compose.py Node for Positive and Negative prompt as well as 'scene-lock'. When scene-lock is true - When lock_scene: True, the node prepends a short instruction block before your positive text that tells the model to treat the provided image as fixed “scene layout” and only change what you explicitly ask. The included language (summarized) is:
  • use the provided image as base;
  • keep composition, subjects, positions, background, lighting, camera angle, clothing, colors unchanged;
  • change only what you specify;
  • do not crop, do not isolate a single subject, do not change the background.
• fsl_ensure_nhwc_batch.py Node guarantees that any incoming image tensor is converted to the [N, H, W, C] (batch–height–width–channels) layout expected by downstream nodes, automatically re-ordering dimensions and normalizing types so all image data conform to a consistent format for safe processing.
• FSLImageSaverWithMetadataV5.py Node stores metadata with image. Data can be easily read using the LoadImage-w-Metadata.json workflow

Located in the Comfyui_FSL_Nodes/ directory.

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🎨 Workflow: T-shirt Designer

• Tshirt-Designer-ver_2.0.json
  It is recommended not to use this workflow. A replacement workflow that is less complex will be uploaded as 3.0 Workflow designed for generating masked transparent images for T-shirt and object printing.
• Many corrections and updates
• Full workflow details and notes are available in tshirt_designer/.

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🎨 Workflow: Nano Banana

• Nano Banana Iterative-Base.json Allows the user to create an image using Gemini-2.5 Flash-image-preview or Gemini-2.5 Flash. Once the initial image is created additional iterations of each succeeding image can be created just be entering a new prompt. Setup is included in a Note node in the workflow.
• Nano Banana Iterative-Load 5 Images.json Provides for using up to 5 nodes to create an image with Nano Banana. The images can they be modified as in the Iterative-Base workflow. Basic instructions are provided in Notes nodes in the workflow.
• Nano Banana w_Griptape w_Upscaler.json Uses Griptape Nodes as a front end prompt loader to Nano Banana. An excellent upscaler by Alex at ComfyUiStudio is included. An OpenAPI Key is required.

Miscellaneous Workflows

• LoadImage-w-Metadata.json Simple workflow to read the metadata created by the FSLImageSaverWithMetadataV5 node

Acknowledgements

• Thanks to Alex and ComfyuiStudio for allowing me to use his excellent upscaler
• Mycroft Holmes - AKA ChatGPT for excellent assistance and guidance in the creation of Custom Nodes

Author

Created and maintained by Fred LeFevre.