Show Sigmas

Worth flagging up front: this node isn't actually named in the pack's README node list - only its sibling, Print Sigmas, gets a description there ("Prints the noise schedule sigma values to see what a scheduler is doing"). Show Sigmas shares the identical input/output shape (takes a SIGMAS list, hands the same list back unchanged), which strongly suggests it's the same debugging idea with a different presentation. The Show/Print naming split is a common convention across ComfyUI node packs - "Print" nodes typically write to the console log, "Show" nodes typically render the value directly on the node itself in the UI - but since the author's README doesn't spell out the distinction for this specific node, treat that as the likely behavior rather than confirmed documentation.

Why you'd want either of these

A scheduler node in ComfyUI outputs a SIGMAS list - the actual sequence of noise levels your sampler will step down through. Normally that's an invisible implementation detail you trust and move on from. But third-party scheduler packs, RES4LYF being the well-known example, can carry schedulers that quietly apply their own internal sigma shift and ignore a shift value you've set elsewhere in the workflow - so you adjust a setting, see no change, and reasonably assume it's broken. It isn't broken; the scheduler overrode it. The only way to actually catch that kind of silent override is to look at the real sigma values, which is exactly the job both of these nodes exist to do.

Inputs and outputs

• sigmas (SIGMAS) - the schedule you want to inspect.

Output is the same SIGMAS, unmodified - a passthrough, same as Print Sigmas. That means you can drop this into an existing sampling chain purely to inspect values without changing anything downstream. It's marked as an output node, so it can execute on its own even without anything wired after it.

Installing it

ComfyUI Manager: search "ComfyUI-Image-Filters," install, restart. Or:

cd ComfyUI/custom_nodes
git clone https://github.com/spacepxl/ComfyUI-Image-Filters

pip install -r requirements.txt (or install.bat on Windows), restart. No models involved.

Same OpenCV note as the rest of this pack: a conflicting cv2 build from another node pack can throw import errors for this whole repo on startup, not this node specifically. Run import_error_install.bat to reinstall the single correct opencv variant if you hit that.

Common issues

If you wire this in expecting console output and see nothing in your terminal, that's likely the point - check the node itself in the canvas, since (per the Show/Print convention) this is probably meant to display on-node rather than log to console. If you specifically want a console log instead, try Print Sigmas alongside or instead of this one. Beyond that presentation difference, there's little that can go wrong: it's a passthrough, so if your generation output changes after adding this node into the chain, that's unexpected behavior worth investigating rather than something the node is supposed to do.