MOSS-BBoxStudio: a visual BBox layout editor for structured image conditioning in ComfyUI

dotMastaz · reddit · 2026-10-21

A developer released MOSS-BBoxStudio, an open-source ComfyUI custom node providing an interactive bounding-box layout manager and spatial prompt editor for structured image conditioning models like MOSS-Image.

The node embeds an HTML5 Canvas UI inside LiteGraph, letting users visually arrange spatial elements, adjust Z-index layer order, select target aspect ratios, and construct complex multi-object scene prompts without hand-writing BBox coordinates.

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