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ComfyDeploy: How Bobs_Latent_Optimizer works in ComfyUI?

What is Bobs_Latent_Optimizer?

This custom node for ComfyUI is designed to optimize latent generation for use with FLUX, SDXL and SD3. It provides flexible control over aspect ratios, megapixel sizes, and upscale factors, allowing users to dynamically create latents that fit specific tiling and resolution needs.

How to install it in ComfyDeploy?

Head over to the machine page

  1. Click on the "Create a new machine" button
  2. Select the Edit build steps
  3. Add a new step -> Custom Node
  4. Search for Bobs_Latent_Optimizer and select it
  5. Close the build step dialig and then click on the "Save" button to rebuild the machine

Bobs FLUX/SDXL/SD3.5L Latent Optimizer Node

This custom node for ComfyUI is designed to optimize latent generation for use with both FLUX, SDXL and SD3 modes. It provides flexible control over aspect ratios, megapixel sizes, and upscale factors, allowing users to dynamically create latents that fit specific tiling and resolution needs.

Features

  • Custom Aspect Ratio Input: Enter any aspect ratio in the format x:y. This allows for total control over the image dimensions.
  • Megapixel Size Selection: Choose from different megapixel sizes (1, 1.25, 1.5, 1.75, and 2 MP) to adjust the resolution dynamically.
  • Upscale Factor: Specify an upscale factor to ensure proper scaling of the latent image.
  • Mode Switch (FLUX/SDXL/SD3): Select between FLUX, SDXL, or SD3 modes for optimal latent generation and tiling. SDXL/SD3 mode rounds dimensions to the closest SDXL/SD3 resolution.
  • Automatic Tile Calculation: The node automatically calculates tile dimensions to ensure the generated latent is split into 4 tiles after upscaling.

Installation

  1. Download the .py file Bobs_Latent_Optimizer.py.
  2. Place the file in the custom_nodes folder of your ComfyUI installation.
  3. Restart ComfyUI to load the node.

Inputs

  • Aspect Ratio: Enter an aspect ratio in the format x:y. Example: 16:9 for a widescreen aspect ratio.
  • Megapixel Size: Select the resolution size based on megapixels. Options include 1, 1.25, 1.5, 1.75, and 2.
  • Upscale Factor: A float value to define the upscaling factor.
  • Mode: Choose between FLUX, SDXL and SD3. This changes how the resolution is rounded and handled.

Outputs

  • Latent: The generated latent image based on the provided resolution and aspect ratio.
  • Tile Width/Height: The dimensions of the tiles after upscaling.
  • Upscale Factor: The factor by which the image was upscaled.

Example Usage

In the ComfyUI workflow, insert this node where you need to generate a latent with a specific resolution and aspect ratio. Pass the latent to an upscaling node (such as UltimateSDUpscale) for further processing. to use with UltimateSDUpscale you must first right-click the node and chage the following widgets to inputs tile_width, tile_height, upscale_by.

image

[Bobs Latent Optimizer] --> [sampler node] ~~> [Upscaling Node]

Contributions

Feel free to submit issues or pull requests to improve the node. Any feedback or suggestions are welcome!

License

This project is licensed under the MIT License.