Updated: Aug 24, 2025
base model
This upscaler is not mine, all the credit goes to: KIM2091
Official WIKI page: openmodeldb
License of use it: CC-BY-NC-SA-4.0
HOW TO INSTALL:
Copy the file 4x-UltraMix_Smooth.safetensors inside the folder: stable-diffusion/models/ESRGAN or ComfyUI/models/upscale_models
Restart/Reload you Stable Diffusion instance
The upscaler should be visible for hi-res and extras tabs