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Geometry effect

Mirror

Mirror is a kaleidoscope and geometry effect in FRCTL, the browser VJ studio. Folds the picture across the width, then the height, up to five times, so the whole subject repeats in a mirrored grid. Seam draws the folds dark or bright.

Runs live on video, images, a camera or generated art. Stack it with any other effect, and route LFOs, envelopes or any of ten audio bands to its controls so it moves with the music.

The untouched demo art: an eye inside a triangle over wavy teal, blue and peach lines
Source
The eye-in-triangle art tiled four across and two down, the top row upside down and each copy squeezed narrow
Mirror, default settings

What Mirror does

Folds the picture in half across the width, then the height, then the width again, up to five folds, squeezing the whole cropped picture into each new tile. The eye repeats as narrower mirrored copies in a strict grid with hard fold lines. The Mix slider sets the fold count and Margin how much edge is trimmed first. Seam rules every fold dark or bright, and Line width sets how thick.

Using Mirror

Where it works
Wallpaper repeats for cover art, merch and backdrops where the whole subject should appear in every tile. The fold count snaps, so a MIDI knob on the Mix slider gives clean pattern changes live.
With the music
It has no motion of its own. MIDI-map the Mix slider to step between fold counts on phrase changes, or send a beat-triggered Envelope to Margin so each hit zooms every tile in slightly.
Starting point
Mix slider just past centre for four columns by two rows, Margin at centre, Seam at a quarter and Line width at centre for thin dark fold lines.

Controls

Margin
Trim margin scale on the mirrored crop.
Seam
Rules every fold line. Centre is a clean fold, left draws it dark, right draws it bright.
Line width
Thickness of the fold lines Seam draws, from a hairline to about eight pixels.

Pairs well with Mirror