Switch Any Fallback 🐲

Most switch nodes in ComfyUI have a nasty habit: mute or bypass the node feeding one of their inputs, and the switch errors out or silently passes nothing. This one was written specifically because the author couldn't find a switch that tolerated a None second input. That's its whole reason to exist, and it's a genuinely useful niche.

How it works

Ryuu_FallbackSwitchAny has two data inputs - on_true_fb and on_false - plus a boolean toggle:

• boolean = True → output on_true_fb.
• boolean = False → try on_false. If on_false is actually connected and has data, use it.
• on_false is None (muted, bypassed, or just not connected) → fall back to on_true_fb and print a console message.

Both inputs are typed * (AnyType), so this one node switches models, latents, conditioning, images, strings - whatever you throw at it. That's the "Any" in the name, and it's why you'd reach for this over the typed image/latent variants unless you specifically want the type-safe sockets.

The key thing most switches get wrong: when the second branch is bypassed, ComfyUI hands the switch a None and the switch panics. Here, None is the expected state and the fallback is the design. Mute a whole branch mid-experiment and the workflow keeps running, which is exactly what you want when you're A/B testing two paths without tearing out wires.

When to reach for it

The classic setup is choosing between two candidate images or two model branches. Say you've got a "good" path and an "experiment" path: wire the experiment into on_false, keep the reliable output in on_true_fb, and flip the boolean to compare. Bypass the experiment node entirely and you just get the reliable one - no error, no dead workflow.

It's also useful as a safe primitive inside shared workflows where someone else might bypass things. That's the real pitch: it's a switch that degrades gracefully instead of failing loudly.

The inputs

Only three to think about:

• boolean - which input gets priority (default False).
• on_true_fb - output when True; also the fallback.
• on_false - output when False if it's actually provided. Optional, which is the whole point.

Output is a single * socket carrying whatever you routed through. The console message on fallback is normal, not an error - if it's cluttering your log, the pack's settings page lets you lower the log level.

Installing it

cd ComfyUI/custom_nodes
git clone https://github.com/DraconicDragon/ComfyUI-RyuuNoodles

Restart, or grab it via ComfyUI Manager (search "RyuuNoodles"). No models, no heavy deps - the pack's only real requirement is color-matcher, which this node doesn't touch.

Gotchas

Note that the node reports itself as an output node in ComfyUI - harmless, it can still be wired onward. And while AnyType sockets are convenient, the community's anti-anything-anywhere sentiment exists for a reason: it makes graphs harder to debug. If your workflow is shared, consider the typed Switch Image Fallback or Switch Latent Fallback variants when you know the type ahead of time.