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Light & lasers effect

Laser Feedback Halo

Laser Feedback Halo is a neon and laser effect in FRCTL, the browser VJ studio. Feedback-based trailing halos around bright stage regions.

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.

Try Laser Feedback Halo free All effects

The untouched demo art: an eye inside a triangle over wavy teal, blue and peach lines — Source

The eye-in-triangle art with soft doubled outlines, a pink cast on the left and a green-teal glow on the right — Laser Feedback Halo, default settings

What Laser Feedback Halo does

Feeds its own last frame back in slightly zoomed and twisted, then keeps whichever is brighter, so light areas throw halos that expand outward as they fade while the twist swings slowly back and forth. A colour grade runs across the frame between Hue and its opposite, pink on the left into green on the right by default. Echo sets how far each echo grows.

Using Laser Feedback Halo

Where it works: Stage footage with lights, lasers or a lit performer, where bright parts should leave trailing echoes, and ambient loops where a logo keeps radiating copies of itself outward.
With the music: The twist swings slowly on the clock. B1 kick on Halo pumps the echoes brighter on each kick, and B2 sub bass on Echo lets the halos grow faster on sustained lows.
Starting point: Echo at centre, Tint at a quarter, Halo at three-quarters, Direction on Right, so bright areas trail long halos with a light colour cast.

Controls

Echo: Feedback echo UV shrink and rotation.
Tint: Laser tint on echo and bright adds.
Halo: Halo max-blend and additive strength.
Hue: Laser tint color across the halo.
Direction: Which way the laser tint runs across the halo.
Speed: Rate of the effect motion. Centre is the authored speed, hard left a tenth of it.

Pairs well with Laser Feedback Halo