ImageBlur_motorway_edition

You'll reach for a blur more often than you'd think: softening a busy background so the subject pops, smoothing the seam where two crops meet, or pre-blurring before a low-denoise upscale pass so the upscaler doesn't amplify noise. ImageBlur_motorway_edition is ComfyUI's stock ImageBlur node, wrapped for the MOTORWAY 🚌💨 pipe in agilly1989/ComfyUI_agilly1989_motorway.

The wrapper's job is simple: it reads the image out of the pipe under INPUT_image_key (default "image"), runs the Gaussian blur with your settings, and stores the result back under OUTPUT_IMAGE_key (default "IMAGE"). The node's only visible output is the Motorway pipe itself - the blurred image is parked in the pipe, not on a wire.

The settings that matter

• blur_radius (INT, 1 to 31, default 1) - the kernel size. Higher = heavier blur
• sigma (FLOAT, 0.1 to 10, default 1) - the standard deviation, which controls how much the kernel spreads

In practice, radius is the coarse dial and sigma is the fine one. For a light "take the edge off" blur you'll stay near the defaults; for a real background smudge you'll push radius up into the double digits. If you're blurring before a denoise-based pass, start gentle - you can always blur more, but detail you blur away is gone.

How it works

Standard *_motorway_edition mechanics: pop the Motorway, look up the image with the input key string, call stock ImageBlur with your widget values, write the result under the output key, and hand back a cloned pipe so nothing upstream is mutated. Underneath it's the exact same node ComfyUI ships - nothing invented here.

Installing

cd ComfyUI/custom_nodes
git clone https://github.com/agilly1989/ComfyUI_agilly1989_motorway

Restart ComfyUI, or install via ComfyUI Manager by searching "motorway". No dependencies beyond what ComfyUI already has, no model files to download.

Gotchas

The usual pipe-node warnings apply. Keys are exact and case-sensitive - a 'MotorwayClass' object has no attribute 'hash_' error means your key string doesn't match anything in the pipe, so double-check what the node writing the image actually stored it under. And mind the case defaults: you read "image" (lowercase) but write "IMAGE" (uppercase), so chaining two clones requires you to align the key strings by hand. Finally, this whole motorway_edition family is the pack's experimental clone feature, currently disabled in the 1.1.7 hotfix - if the node isn't in your menu on the latest release, stock ImageBlur does the identical job with wires.