Bismuth Stairs is a kaleidoscope and geometry effect in FRCTL, the browser VJ studio. Stepped UV displacement with metallic iridescent terraces.
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.
Carves the frame into diamond-shaped terraces stepping out from the centre and pulls each block's pixels towards its corner, so the picture breaks into staircase tiles. A rainbow tint runs across the steps with a bright line on every edge, like a bismuth crystal. Terraces sets how many steps, Offset how hard the blocks pull, Irid the tint, and Direction which way the rainbow runs.
Using Bismuth Stairs
Where it works
Cover art and posters with a hard, metallic crystal finish, and hold frames between drops. The terraces stay put, so the blocky structure reads cleanly on a still and on a slow intro.
With the music
No motion comes built in. A beat-triggered Envelope on Offset makes the blocks snap on each hit, and B5 on Irid lets the mids brighten the rainbow terraces.
Starting point
Terraces at centre, Offset at a quarter, Irid at three-quarters, Direction on Right, then add Offset until the eye starts to step.
Controls
Terraces
Stair step density along diagonals.
Offset
Block UV pull strength.
Irid
Prismatic edge and terrace tint.
Direction
Which way the iridescent tint runs across the terraces.