ModelSamplingStableCascade_motorway_edition

ModelSamplingStableCascade_motorway_edition is the Motorway-pack version of ComfyUI's ModelSamplingStableCascade: it applies Stable Cascade's timestep shift to a model, reading the model from the MOTORWAY 🚌💨 bus by key instead of over a wire.

The native node sets one shift value (default 2.0) on a Stable Cascade (Würstchen) model. Cascade is the two-stage latent model that got effectively strangled by SD3's announcement - the ecosystem stopped investing before the model ever had a real run, as the KB's forgotten-models essay documents. But its samplers still expect the shift, and if you're running one of the remaining Cascade workflows, this is the node that makes the stage-B model sample cleanly instead of producing blown-out noise.

What the motorway edition changes

Same generated-clone pattern as the rest of the _motorway_edition family (clone_nodes_in_the_dangerzone/nodes.py): MOTORWAY 🚌💨 in (required), the shift widget, and two key strings:

• INPUT_model_key (default model) - bus key holding the model to shift.
• OUTPUT_MODEL_key (default MODEL) - bus key the shifted model is written to.

It pulls the model off the bus, applies the shift, writes it back under MODEL, and outputs only the cloned bus. Pull MODEL out with a Motorway 0x1 to feed the sampler. Behaviorally identical to the native node.

Installing

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

or ComfyUI Manager → "ComfyUI_agilly1989_motorway", restart. No pip deps, no model downloads.

The fragility you should know about

Standard warnings for this family. The clones are auto-generated at import time over every registered node, and that's how they've crashed people's startups - a 2025 report shows an unrelated RandomModelClipVae class without a CATEGORY attribute taking down the entire Motorway import. The README's "most should work" caveat and the dangerzone folder name set expectations.

The 1.1.7 hotfix disabled the clone loader entirely, so on current versions this node may not be registered - missing from your menu is expected, not user error. And honestly: if you're sampling Stable Cascade at all, you're in a niche of a niche, and you don't need the extra bus-shaped risk - the native node is right there.