ImageScaleBy_motorway_edition

Scaling by a factor is the resize you reach for when you don't care about an exact output size - you just want it 2x bigger or 0.5x smaller. ImageScaleBy_motorway_edition is stock ComfyUI's ImageScaleBy, wrapped for the MOTORWAY 🚌💨 pipe in agilly1989/ComfyUI_agilly1989_motorway.

It reads the image out of the pipe under INPUT_image_key (default "image"), scales it, and stores the result back under OUTPUT_IMAGE_key (default "IMAGE"). Only visible output is the Motorway pipe.

Inputs that matter

• INPUT_image_key (default "image") - pipe key of the source
• upscale_method - nearest-exact, bilinear, area, bicubic, lanczos
• scale_by (FLOAT, 0.01 to 8, default 1) - the multiplier
• OUTPUT_IMAGE_key (default "IMAGE") - where the scaled image lands

The method choice is where the taste lives. For "just make it bigger without inventing anything," lanczos is the honest interpolator - it's what people mean when they say a plain resize, and the KB's upscaling essay backs that up: it adds no content, can't hallucinate, runs instantly. area is the downscale workhorse (good when shrinking). nearest-exact is for hard pixel-art scaling. And a blunt truth about this whole family of resize nodes: they don't add detail. If the image is soft, a factor-2 lanczos won't fix it - that's a job for a proper upscale model on a separate pass.

How it works

Standard clone mechanics: pop the Motorway, pull the image out by key, run stock ImageScaleBy with upscale_method and scale_by, store the result under the output key, and return a clone of the pipe so nothing upstream is mutated.

Installing

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

Restart ComfyUI, or grab it via ComfyUI Manager by searching "motorway". No requirements.txt, no model downloads - pure Python.

Gotchas

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. Watch the case trap - you read "image" (lowercase) and write "IMAGE" (uppercase), so chained clones need hand-aligned keys. And the family caveat: BETA, with the motorway_edition clones disabled in the 1.1.7 hotfix - if the node's missing from your menu, stock ImageScaleBy is the same node with wires.