Generates an image in SDXL and upscale it to 2x the original resolution using Tile Controlnet, Tiled Diffusion and colour matching. You can provide your own image (e.g. from Flux) for upscaling and disable the image generation process.

Nodes

Install the following custom nodes using ComfyUI Manager:

• rgthree's ComfyUI Nodes

• KJNodes for ComfyUI

• ComfyUI Essentials

• ComfyUI-Advanced-ControlNet

• Tiled Diffusion & VAE for ComfyUI

Models Required

Checkpoint:

• Dreamshaper Turbo https://civarchive.com/models/112902?modelVersionId=351306

• You can use your favourite checkpoint but be sure the change the settings in the KSampler

Tile Controlnet:

• xinsir/ControlNet++: All-in-one ControlNet (ProMax model) - higher detail

• xinsir/ControlNet Tile SDXL (better colours)

This workflow implements the ideas from this video by Latent Vision: