A coro prop is a good place to learn how the physical build and xLights model work together. Pick one design, confirm its pixel requirements, follow the wiring path, and test it while you can still reach every node.
For a concrete example, we will use our CoroWorks Classic Snowman. Its product page lists 400 pixels, 12mm bullets with 4-inch spacing, a printed pixel path on the back, and a start marked with a star. Those details belong to this prop; check the listing for any other design you choose.
1. Put the complete parts list on the bench
Before pushing pixels, check the prop and backer components, the required pixel count, compatible mounting hardware, and the route to your controller. Add extensions and the planned power arrangement to the same list.
Our EVO 12mm pixels are a 12V WS2811 option with a 4-inch-spacing choice. Check the selected spacing, string quantity, connector variant, and fit for your prop. A box of pixels being the right total quantity does not tell you how its individual strings will connect through the design.
| Check | For this Snowman example |
|---|---|
| Pixel quantity | 400 pixels listed for the pixel version. |
| Physical size and spacing | 12mm bullets with 4-inch spacing. |
| Wiring reference | The printed path on the back, starting at the marked star. |
| Electrical requirements | Determined by the selected pixels, controller, power supply, cables, and connectors. |
| Software model | The download for the exact prop and revision, checked against the physical wiring. |
2. Download the model before you commit to the wiring
Use the xLights model download on the product page or our CoroWorks model download page. For this example, the product currently links to the Snowman model ZIP. Unzip it and use the included .xmodel file.
Check the name, size, node count, orientation, and wiring path against your prop before filling every hole. If they disagree, stop and get the matching model or clarification. That is easier than changing a completed wiring path.
The official xLights Custom Model guide explains how node numbers describe the layout. A model tells the software where the nodes are; it does not verify the power design for your build.
3. Follow the printed path in the right direction
Work with power disconnected. Identify the first pixel's data input, locate the starting mark on the back of the prop, and follow the numbered path for that design. Keep the wiring information beside you as you work.
Pay attention to whether a drawing shows the front or the back. A mirrored view can make a path look wrong when you are simply looking from the other side. Do not change the sequence of holes based on appearance alone.
Leave enough wire for the route and the mounting arrangement without pulling on a pixel or connector. If a jump is too long for the specified spacing, check the instructions and your starting point before improvising a connection. Use the intended support and strain relief so the pixels are not carrying the prop's weight.
4. Keep channel count and power capacity separate
Four hundred independently addressed RGB pixels use 1,200 color channels: 400 × 3. That is data arithmetic. It does not mean every controller can run the prop on one output, or that one power feed is enough.
Check the actual controller's pixel limits, output protection, voltage arrangement, and cable capacity. Plan power using the selected pixels' specifications and your intended operating conditions. Finish those checks before connecting the full prop.
5. Assign the imported model to your controller
Import the .xmodel in Layout and name the prop for its yard position. Assign it to the correct controller and physical port or ports. Review inherited channel settings; numbers from the model creator's show are not an address plan for yours.
Confirm the node count and physical wiring order, then use the configuration tools supported by your controller. Our xLights model import and wiring guide walks through that process in more detail.
6. Test the parts you just built
- Run the controller's supported local test if available.
- From xLights, test solid red, green, and blue at an intensity within your electrical plan.
- Run a slow one-node chase from the first node to the last.
- Watch transitions between sections of the prop and between pixel strings.
- Try a simple effect, then test at the intended show brightness.
If the chase goes through the wrong section, compare the physical path with the model. If colors are consistently swapped, check color order and channel alignment. If an entire later section fails, inspect the last working point and the next connection with power disconnected. Avoid changing several settings at once.
7. Label it before it goes into the yard
Label the input, controller destination, pixel count, and voltage. Photograph the wiring and save the model with your show backup. Those few details make troubleshooting and next season's setup easier.
If you need us, email Support@Mattosdesigns.com with the prop name, order number, pixel and controller details, model filename, and a short chase video. Include a photo of the wiring around the first place the test goes wrong.
Keep learning in the Mattos Designs Learning Center, with guides for your next project and troubleshooting help when you need it.
Reviewed October 29, 2026.
