Beakfx-mbq/comfy_nodes

ComfyUI-MBQWedge

A single ComfyUI node that sweeps a numeric parameter across a range, generating one image per value — analogous to a photographic wedge or exposure bracket.

Install (local / Phase 1)

Copy or symlink this comfy_nodes/ folder into your ComfyUI custom nodes directory:

ComfyUI/custom_nodes/ComfyUI-MBQWedge/

Restart ComfyUI. The node appears in the node list under MBQ → MBQ Wedge.

Usage

Add MBQ Wedge to your workflow and wire one of its two outputs:

Output socket	Connect to	Example
int_value	Any INT input	KSampler → steps
float_value	Any FLOAT input	KSampler → cfg

ComfyUI greys out incompatible socket types when dragging a link, so you can only connect the right type for the target parameter.

Inputs

Input	Type	Description
parameter_name	STRING	Name of the swept parameter (auto-filled when you connect an output).
start	FLOAT	First value in the sweep
stop	FLOAT	Last value (inclusive)
increment	FLOAT	Step between values

Node display widgets

• will produce → N iterations — live count of images that will be queued
• current → X.XX — the first iteration's value (cosmetic; updates as start changes)

Example: sweep steps 10 → 20 by 2

parameter_name = "steps"
start     = 10
stop      = 20
increment = 2

Wire int_value → KSampler steps. Click Queue → 6 separate jobs submitted automatically.

Example: sweep CFG 1.0 → 7.0 by 1.5

parameter_name = "cfg"
start     = 1.0
stop      = 7.0
increment = 1.5

Wire float_value → KSampler cfg. Click Queue → 5 separate jobs submitted automatically.

How Queue works with MBQWedge

When you click Queue, the MBQ JS extension intercepts the submission and expands it into N individual jobs — one per sweep value. Each job has the swept value patched directly into MBQWedge's inputs (start=V, stop=V, current=V), so the PNG produced by each job carries the exact value in its embedded prompt chunk.

This is the same mechanism ComfyUI uses for per-image seed randomization.

Images appear in the output folder as each job completes — you don't need to wait for the full sweep before results start appearing.

MBQ Viewer integration

Open the generated images in MBQ. The viewer reads MBQWedge.inputs.current from each image's embedded prompt chunk and overlays the swept parameter and its value directly on the canvas (e.g. cfg: 3.5). The Wedge bulb in the status bar lights green when a wedge is detected.

Because the value is embedded in the PNG itself, it remains correct if you move or rename the file.