Bria FIBO Lite

Compare this node to the full Bria FIBO node and the first thing you'll notice is everything that's missing. No steps. No seed. No negativePrompt. That's not a bug - FIBO Lite is the fast sibling of FIBO (it shares the same model family, just a later, leaner version), and the pack has deliberately removed the knobs you'd use to slow yourself down. You get a prompt, dimensions, an optional input image, the three-value CFG choice, and results. That's the whole node.

There's a real argument for this. FIBO's full node hands you steps 20–50, guidance 3/4/5, seeds, and negatives - and on a model that's already trained for speed, half of those are ways to accidentally produce worse output. Lite is the "just give me the image" variant: fire and forget, which makes it the one you'll reach for in draft mode or when you're batch-testing prompts and don't want 50-step waits (or 50-step bills) on every sketch.

What's actually here

• positivePrompt - required, multiline. Same long-caption-friendly behavior as the full model.
• width / height - required, default 1024×1024.
• image - optional IMAGE input for starting from an existing image.
• CFGScale - the only guidance knob, and it's an enum of 3/4/5. FIBO runs best at low CFG; the node just won't let you leave that range.
• numberResults - 1 to 20. Each result is a separate paid inference with a fresh seed. The one cost lever, and the one to be careful with.

Output is a single IMAGE socket into Preview or Save. Everything else (outputFormat JPG/PNG/WEBP, outputQuality, safety, the ipSignal flag) is optional and safe to leave at defaults.

Install and running

Same one-time pack setup, no model downloads because inference happens on Runware's GPUs:

cd ComfyUI/custom_nodes
git clone https://github.com/Runware/ComfyUI-Runware
pip install -r ComfyUI-Runware/requirements.txt

Restart, then drop your Runware API key into Settings → Runware API key (or set RUNWARE_API_KEY). The node is a thin client: your prompt and image tensor go up as a request, an IMAGE tensor comes back, and the run's cost shows on the title bar.

The honest trade

What you're giving up by picking Lite is control, not just clutter. No seed means no reproducible batches - each run is a different result, so if you land on something you love you can't lock it down. No negative prompt means the only way to push the output away from something is to phrase your positive prompt better. And same as the full FIBO nodes, the weights are non-commercial licensed, so check the terms before this becomes part of a product. For personal drafts and quick ideation, none of that registers - Lite is the one you'll actually keep on the canvas.