⬡ Polyhedron Load Upscale Model

Core ComfyUI's upscale-model loader has a small, annoying blind spot: it passes on a bare descriptor with no filename in it. Put two upscalers on the canvas - a 4x ESRGAN for stills and a small detail model for video - and nothing on the wire tells you which model is actually going to run until the run is already under way. ⬡ Polyhedron Load Upscale Model fixes that by loading the model and saying what it loaded.

That's the whole pitch, and for a loader it's a real one. The dropdown shows the file's size so you can tell a heavy 4x ESRGAN from a compact model at a glance before picking. Once loaded, the info output spells out file, architecture ×N, parameter count, precision and size - the same model card the pack's Power Upscale node shows. If you're debugging "why does this upscale look different," the answer is usually "because it's a different model than you thought," and this node makes that impossible to miss.

How it works

It's a thin, honest loader: pick a pixel upscale model from models/upscale_models, and the node loads it and hands over the spandrel descriptor - the exact same type core's loader produces, so it drops into any upscale node (ImageUpscaleWithModel, this pack's Fast Upscale, Power Upscale) without a converter in between. The output is a genuine UPSCALE_MODEL, not a string. The info output is a STRING readout you can wire into a ⬡ Polyhedron Note for a standing label on the canvas.

A quick sanity anchor from the KB's upscaling essay: the ESRGAN family is the workhorse for "more pixels, source already sharp" - clean enlargements that can't hallucinate detail (4x-UltraSharp for general, the anime variants for illustration). Generative refiners are a different tool; knowing which of your models is which is exactly what this loader is for.

What you set and get

• model_name - the upscale model file. Size shown inline.
• upscale_model (out) - the loaded spandrel descriptor, into any upscaler.
• info (out, STRING) - file | architecture ×N | parameters | precision | size.

Installing it

Part of the ⬡ Polyhedron Suite pack. ComfyUI Manager → "Polyhedron Suite", or:

cd ComfyUI/custom_nodes
git clone https://github.com/PolyhedronAI/ComfyUI-PolyhedronLoRAStack.git
# restart ComfyUI

No extra dependencies; model files live in ComfyUI/models/upscale_models and download separately, as usual.

Gotchas

The info readout only exists after a run - like any output, it's populated when the graph executes, so the first time you wire it into a note it'll show empty until you queue once. And remember this is a loader for pixel upscalers: the ESRGAN/spandrel family. If you're trying to load a diffusion refiner or a SuperResolution model that isn't a spandrel descriptor, that's the wrong slot. Blank node under Nodes 2.0? Same as every Polyhedron node - disable Modern Node Design in Settings.