A ComfyUI custom node to create empty latents for Stable Cascade:

• purple background color at creation
• width and height incrementation of 64 by default
• possibility to lock the aspect ratio. Changing the width or the height will update the other dimension accordingly
• switch width/height at execution (not displayed in the node, just taken into account at run time)
• in order to be able to use Latent From Batch node, stage_c and stage_b batch sizes are separated into two widgets

To install, simply git clone the repo in ComfyUI/custom_nodes folder:

git clone https://github.com/Guillaume-Fgt/ComfyUI_StableCascadeLatentRatio.git

You will find the node under latent/Stable Cascade Latent Ratio.