A small ComfyUI node pack for using NAFNet models (specifically this one to try to get rid of Qwen/Wan VAE grid artifacts: https://huggingface.co/DraconicDragon/NAFNet-VAE-DeGrid) that output a residual.
https://github.com/DraconicDragon/ComfyUI-NAFNet-Residual
git clone https://github.com/DraconicDragon/ComfyUI-NAFNet-Residual
comfy node install nafnet-residual