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Racing marble runs
A wave racer is a zigzag wall with several identical lanes side by side. Lift the gate, and the marbles race over the hills, drop down the switchbacks and land in their own finish slots.
Start from a preset
Each preset opens in the generator, ready to tweak, test and download.
How it works
- Every lane has the same shape, just one step higher than the lane inside it, so the race is fair.
- The lanes step up like stadium seats. Each rests on the one inside it, and together their undersides make one straight 45° slope, so it prints without supports.
- The simulator checks every hill: if the marbles would fly off a crest or not make it over, the hills are lowered automatically.
Settings you can change
| Lanes | 2, 3 or 4 lanes. |
|---|---|
| Hills | How many hills per leg, and how tall. |
| Wall length | Longer walls give longer legs. |
| Start | One wide gate card drops into every lane at once (Pro), or an open start. |
Every style also lets you pick your printer, marble size (6 mm BBs to 25 mm shooters), groove shape, slope, wall height, base plate, label and colours.
Printing tips
Use identical marbles for a fair race. Steel balls of the same size are the most consistent. Slice with supports off, 0.2 mm layers and 3–4 walls. The full print guide covers slicer settings and troubleshooting.
Other styles
- Spiral marble run towers: A spiral tower winds a track down around a central core.
- Zigzag marble runs: A zigzag run (or drop wall) sends the marble along a ramp, drops it onto the next ramp going the other way, and repeats all the way down.
- Freeform marble runs: A freeform run wanders across the printer bed in loops and bends, held up by fins with pointed arches (like a Roman aqueduct) or by thin pillars (like a roller coaster).
- Zigzag tower marble runs: A zigzag tower wraps a drop wall round a square core.
- Twin tower marble runs: Two spiral towers side by side, joined by a bridge on aqueduct arches.
- Vortex cascade marble runs: A vortex cascade is a chain of funnel bowls.
- Loop-the-loop marble runs: A steep drop, a vertical loop, then a U-turn back alongside to the finish.