ComfyUI Extension: ComfyUI-VAE-Utils

Nodes for loading and using VAEs in ways not supported by base ComfyUI. Currently supports Wan upscale VAE, more may be added later as needed.

Install

cd custom_nodes
git clone https://github.com/spacepxl/ComfyUI-VAE-Utils

That's it! No extra requirements outside of what ComfyUI already uses.

Models

Wan2.1 VAE 2x imageonly real v1

Nodes

Load VAE (VAE Utils)

Direct replacement for native Load VAE node, but with added input/output channel detection for Wan2.1 VAE

VAE Decode (VAE Utils)

Decode latents with optional auto detected upscaling, and optional tiling

Latent Upscale (VAE Utils)

Simple neural latent upscaler (right), far from optimal but much better than naive bilinear/bislerp interpolation (left).

Currently supported: Wan2.1 2x

Workflows

workflow/workflow_wan_t2i_upscale2x.png

IMPORTANT

To use native VAE decoding with latents from kijai/ComfyUI-WanVideoWrapper, you need to un-normalize the latents first using this node: