Flux 2 Edit Leaves Empty Borders After Composite; How to Regenerate?

Lemenus · reddit · 2026-09-08

A user's Flux 2 Edit workflow hits an issue: 16:9 images get resized, then the Composite node produces empty gaps at the borders. They want to avoid the node's mirrored-pixel fill, and are considering either generating a mask of empty pixels or drawing a border mask and refilling it via prompt, but don't know how. Full workflow is shared via link for the community to help.

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