Voronoi Christmas tree 3D print, a cheerful tealight centerpiece

A Voronoi Christmas tree 3D print sits somewhere between an ornament and a lamp, and that double life is exactly the point. The design uses the organic, cell-like Voronoi pattern to turn a solid tree shape into an open lattice, so light can pass through the gaps instead of bouncing off a flat surface.

Two versions, one shape

The file comes as two distinct builds rather than one model with an optional add-on. The LED version includes a screw-cap base sized for a standard tealight, so you print the tree, print the cap separately, and twist them together with a lock system built into both parts. The second version skips the tealight mount entirely and is meant to stand as a clean piece of sculptural décor without any electronics involved. Picking between them is really a question of whether you want ambient light or a quiet shape on a shelf.

If you print the tealight version, the cap holds a standard LED tealight, not a candle, which keeps things simple and safe around a tree-shaped lattice. You place the tealight on the cap, screw the cap into the base of the tree, and the light sits hidden inside the structure rather than glaring out as a single bright point. That hidden-light trick is what makes the Voronoi Christmas tree 3D print feel warmer than a printed ornament that just sits there.

Why the Voronoi pattern works here

A Voronoi lattice is an unusual choice for a Christmas tree, since most printable trees go for smooth cones or faceted low-poly facets. Here the irregular cell pattern gives the tree a more organic, almost frosted look, and it does double duty structurally: the gaps are what let the tealight glow through once it’s assembled. It reads as modern rather than traditional, which is worth knowing if your holiday display leans more Scandinavian minimal than classic ornament-heavy.

Can you scale the Voronoi Christmas tree 3D print?

Yes, but only on the LED version, and only if you scale the cap and the tree together at the same dimension. Since the cap is built to a specific size to fit a standard tealight and lock into the tree’s base, scaling one part without the other will break the fit. If you want a taller or shorter tree for a particular spot on a shelf or mantel, resize both STL files by the same percentage before you print either one.

What you get in the files

The download includes the Voronoi tree body for the LED version, the matching screw-cap sized for standard LED tealights, and the separate decorative tree without any tealight mount. The twist-lock system between cap and tree is part of the geometry itself, so there’s no separate hardware to source once you’ve printed the pieces. This is useful if you’re printing several at once for a mantel row or a table setting, since you can mix tealight and non-tealight trees from the same two files.

Where it fits in a holiday setup

Both versions are built for the kind of spaces where a traditional tree doesn’t make sense: shelves, a side table, a windowsill, or a cluster of small decorations near the entryway. The LED version carries the room on its own as an evening centerpiece, since the glow coming through the lattice does the visual work without needing other lights nearby. The non-tealight version works better mixed in with other pieces, since it’s lighter and doesn’t compete for attention the way a lit object does. Either way, it belongs in a holiday collection built around quieter, more sculptural pieces rather than bright plastic ornaments, and it sits naturally alongside the other designs in the Christmas Collection.