LED Bars & Pixel Mapping

An LED fixture describes a grid of addressable pixels. Create one and set:

• Grid — columns × rows (the pixel resolution of the bar or panel).
• Pixel format — the channel order per pixel: RGB, GRB, RGBW, single-channel intensity, and more, or a custom order.
• Wiring mode — row-major or column-major addressing.
• Serpentine — alternate the direction of each row to match strips that snake back and forth.
• Start corner — top-left, top-right, bottom-left, or bottom-right, to match how the strip is physically wired.

Add LED instances to the pixel-mapping canvas — each is a placed copy of an LED fixture you can position, size, and rotate in normalised 0..1 canvas coordinates. Lay them out to mirror your real-world rig: a line of bars, a matrix, an arch.

• Position, size, rotation — where the fixture sits on the canvas.
• Brightness & gamma — per-instance tone shaping.
• DMX patch — universe, start channel, and protocol (Art-Net/sACN) for that instance.

The LED Map Out node ties it together. It takes a Video input, renders it to the canvas, samples the image at every LED pixel, scales to 0–255 per channel, and sends DMX to each instance's patch.

1. 1

   Feed it a visual

   Wire any video source — a generator, an effect chain, a compositor, or media — into the LED Map Out's video input (see Generating Visuals).
2. 2

   Add your instances

   Place the LED instances on the map's canvas and patch each to its DMX address.
3. 3

   Output

   The node continuously samples the visual at each pixel and streams DMX — your bars now show the moving image.

Because the input is just a visual, anything you can render you can map: an audio-reactive plasma, a scrolling gradient, text, or a camera feed. Continue to Putting It Together to see the full audio-to-pixels chain.