Empty Latent Image Custom Presets (EmptyLatentImageCustomPresets) - ComfyUI-KJNodes

Empty Latent Image Custom Presets is a node that reads preset dimension options from a custom_dimensions.json configuration file located in the same directory and generates an empty latent image at the specified size.

This node allows users to select an image resolution from a predefined list and supports batch generation, providing an initial latent space representation for subsequent image generation workflows.

Functionality

The node reads preset dimension options from a custom_dimensions.json file in the same directory, parsing the selected preset into width and height values. It uses ComfyUI's built-in EmptyLatentImage functionality to create an empty latent tensor of the specified dimensions, with an option to swap width and height.

Parameters - Empty Latent Image Custom Presets

Parameter	Type	Required	Default	Range/Options	Description
`dimensions`	COMBO	Yes	-	Preset options	Select image dimensions from a preset list loaded from `custom_dimensions.json`.
`invert`	BOOLEAN	Yes	False	-	When True, swaps the width and height values of the selected preset.
`batch_size`	INT	Yes	1	1 - 4096	Number of latent images to generate in a batch.

Output

Name	Type	Description
Latent	LATENT	The generated empty latent image tensor.
Width	INT	The final image width in pixels.
Height	INT	The final image height in pixels.

Use cases

This node is useful in workflows that require fixed-size images. For example, when batch-generating social media avatars or wallpapers with specific aspect ratios, you can preconfigure common dimensions and use this node to produce empty latents at the right size before connecting to a KSampler or other sampling node.

Notes

The available dimensions depend entirely on the external custom_dimensions.json configuration file. If this file is missing or malformed, the node will not provide any preset options.

Source code

Empty Latent Image Custom Presets is part of the ComfyUI-KJNodes node pack.

Empty Latent Image Custom Presets(EmptyLatentImageCustomPresets)