| image | IMAGE | | The image URL to expand using outpainting. |
| expand_top | INT | 00–2048 | Pixels to expand at the top of the image. |
| expand_bottom | INT | 00–2048 | Pixels to expand at the bottom of the image. |
| expand_left | INT | 00–2048 | Pixels to expand on the left of the image. |
| expand_right | INT | 00–2048 | Pixels to expand on the right of the image. |
| auto_crop | BOOLEAN | false | Whether to automatically crop the reference image when the expanded canvas does not fully contain it. |
| mode | COMBO | high | Quality/speed trade-off for outpainting. `high` (default) delivers the highest-fidelity results; `fast` is significantly faster and extends most scenes well but may produce lower fidelity. |
| enable_safety_checker | BOOLEAN | true | Whether to enable the safety checker. Disabling it requires account authorization; unauthorized requests are always checked. |
| output_format | COMBO | jpeg | The format of the generated image. |
| max_cost_usdopt | FLOAT | 20.00–100000 | Safety cap. If the estimated cost of this run is above this many US dollars the node stops BEFORE sending anything to fal. 0 = no cap. |
| reuse_identical_runopt | BOOLEAN | true | If these exact inputs (the settings AND the same pictures/clips/audio) were already paid for and the files are still in output/fal, return them instead of paying again - also after a ComfyUI restart. Turn off for a fresh take with the same settings. |
| extra_jsonopt | STRING | | Advanced: a JSON object merged into the request last, for any fal field this node has no box for. Example: {"seed": 7}. Leave empty normally. |
| max_concurrentopt | INT | 11–32 | How many paid fal calls may run at the same time in one run, across every fal node. 1 (default) = one after another. This node starts its paid part only while fewer than this many fal calls are running. Once any fal node fails, the ones still waiting are not started, so nothing more is billed. |
