A custom keying pipeline for miniature plates, built because normal keyers struggled with spill and practical surfaces.
2026-02-18 / 5 min
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I shoot miniatures on green screen. Tiny models with chrome, glass, and paint catch everything, and standard keyers are not always built for that kind of surface.
CorridorKey runs matte refinement and a custom despill pipeline that understands what green contamination looks like on practical miniature surfaces. It runs on the Mac, processes a full shot from the command line, and keeps the work repeatable.
The pipeline now goes from raw plate to segmentation hints, CorridorKey inference, matte refinement, and comp. The first real green-screen shot produced a matte that was cleaner than my previous manual approach in far less time.
Next up: conservative and aggressive refine profiles, per-shot quality scoring, and more real KORETH footage instead of only test clips.
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