Image Bridge 🪽

Image Bridge 🪽 is the most boring node in ComfyAngel and the one you'll miss the most. It's a pass-through: image in, same image out, with a preview or save along the way. That sounds like nothing, but inside a loop it's everything - it's the node that lets you actually see each iteration's result instead of staring at a frozen canvas while a 20-item loop runs in the dark. The README calls it essential for loops, and that's not marketing; skip it and your first loop will feel broken.

What it does

Two modes:

• preview (default) - shows the image like a Preview Image node. Inside a loop, you see every pass as it completes.
• save - writes a PNG to ComfyUI's output folder with a counter-suffixed filename built from filename_prefix (ComfyAngel_00001.png, etc.).

The save_metadata toggle (on by default) embeds the prompt and workflow into saved PNGs, same as the official Save Image - so a saved loop output is still drag-back-into-ComfyUI reproducible. The image passes through unchanged: it's the one node that can preview a batch without altering it, and since v0.6.0 it handles batches of differently-sized images by previewing them padded but outputting the originals untouched.

Why the loop pairing matters

ComfyUI's preview nodes are output nodes - they mark the end of a branch and force execution. Inside a dynamic loop, that's exactly what you need: a visible check that each iteration produced something worth keeping, mid-run, without stopping the loop. The pack's own loop recipe is Loop Start → sampler → Image Bridge → Loop End. Put it after the VAE decode inside the loop and you'll watch every result roll by.

One quirk to know: the output is a list of tensors (the node splits batches into individual images internally), so it feeds naturally into loop machinery and list-aware nodes. If something downstream insists on a single IMAGE tensor, you may need a list-handling node or a batch-aware consumer - that's the one friction point.

Installing it

cd ComfyUI/custom_nodes
git clone https://github.com/ThepExcel/ComfyAngel.git

Restart ComfyUI, or search "ComfyAngel" in ComfyUI Manager. Dependency footprint is just Pillow; no model files.

Honestly, the biggest "troubleshooting" for this node is remembering it exists. You'll build a loop without it, run it, see nothing happen for a full minute, and go "wait, did it hang?" - it didn't; it just had nowhere to show you anything. Drop a Bridge in preview mode inside the loop and the whole experience changes. In save mode, remember the counter resets per run but never overwrites - you get _00001, _00002… forever, which is exactly what you want from a batch.