POLYMASON

Low poly trees: a free 3D tree generator, 24 species

Choose a species and PolyMason proposes a whole tree. From there you work through five steps: Species, Trunk, Boughs, Foliage, Export. Every control is limited to what the species allows, so a birch can't get as fat as an oak and a pine keeps its whorls. The geometry follows a few rules so the result holds together. A broadleaf's trunk ends where it divides into its top boughs, and they share its thickness between them. A conifer keeps one leader all the way to the tip. Foliage can be one closed mesh or many, and its complexity slider is your triangle budget.

Open the tree builder

Species

Each species has its own page with a picture and notes on using it in a game. You can also open the builder and choose there.

A low poly pine tree made with PolyMasonPine7 to 12 m · 132 trianglesA low poly spruce tree made with PolyMasonSpruce9 to 15 m · 156 trianglesA low poly Douglas fir tree made with PolyMasonDouglas fir14 to 24 m · 180 trianglesA low poly larch tree made with PolyMasonLarch11 to 19 m · 156 trianglesA low poly cedar of Lebanon tree made with PolyMasonCedar of Lebanon10 to 18 m · 8,744 trianglesA low poly Italian cypress tree made with PolyMasonItalian cypress6 to 12 m · 610 trianglesA low poly redwood tree made with PolyMasonRedwood24 to 40 m · 196 trianglesA low poly silver birch tree made with PolyMasonSilver birch6 to 11 m · 888 trianglesA low poly aspen tree made with PolyMasonAspen7 to 12 m · 2,065 trianglesA low poly Lombardy poplar tree made with PolyMasonLombardy poplar10 to 16 m · 846 trianglesA low poly cottonwood tree made with PolyMasonCottonwood10 to 16 m · 1,690 trianglesA low poly oak tree made with PolyMasonOak7 to 12 m · 312 trianglesA low poly maple tree made with PolyMasonMaple8 to 15 m · 3,200 trianglesA low poly beech tree made with PolyMasonBeech10 to 17 m · 3,884 trianglesA low poly elm tree made with PolyMasonElm10 to 16 m · 3,103 trianglesA low poly cherry tree made with PolyMasonCherry4 to 7 m · 2,930 trianglesA low poly willow tree made with PolyMasonWillow7 to 11 m · 830 trianglesA low poly eucalyptus tree made with PolyMasonEucalyptus10 to 20 m · 3,844 trianglesA low poly mesquite tree made with PolyMasonMesquite3 to 5 m · 639 trianglesA low poly acacia tree made with PolyMasonAcacia3 to 8 m · 1,069 trianglesA low poly juniper tree made with PolyMasonJuniper2.5 to 5 m · 3,240 trianglesA low poly olive tree made with PolyMasonOlive3 to 6 m · 3,200 trianglesA low poly Joshua tree made with PolyMasonJoshua tree3 to 7 m · 450 trianglesA low poly baobab tree made with PolyMasonBaobab7 to 14 m · 2,695 triangles

What you decide

  • Trunk: height, diameter, taper, sides, lean, curve, gnarl and bark color.
  • Boughs: how many, in rings or a spiral, where they leave the trunk, their angle, length, thickness and curve, and the same again for twigs.
  • Foliage: clumps, cards, leaves, cones or one wrapped mass, then size, spread, complexity and two greens.
  • Export: LOD1 and LOD2, sapling and young versions, dead, stump, felled, logs and billboards.

Formats

You download a zip. The OBJ is one mesh with one material. Its colors come from the PolyMason palette, a single texture of 3,821 color blocks that every model from here shares, so a scene full of them is still one material. Flat normals are written into the file. There's also STL for printing and 3MF with the exact colors. GLB is next. Everything is in meters and stands on the ground at the origin, which is what Unity and Godot expect. Unreal wants a scale of 100 on import, and the OBJ guide shows where to set it.

Read before you import

Flat shading in Unity for low poly modelsThe OBJ file format, explained for game enginesLODs and billboards for low poly modelsFree low poly assets for GodotHow to make low poly trees for games

Other things to build

TreesRocks

Questions

How many triangles is a tree?
A few hundred to a few thousand, depending on the foliage style and the complexity slider. The count is shown as you build, and the export adds LOD1 and LOD2 at a fraction of it.
Can I get billboards?
Yes. Select billboards at the export step and the zip includes rendered front and side images to use at a distance.
Is it free?
Yes. There's no account, no watermark and no limit on downloads.
Can I use it in a commercial game?
Everything you build here is yours. Use it in any project, commercial or not, with no attribution required.
What does it export?
A zip with OBJ, STL and 3MF. The OBJ is one mesh with one material on the shared PolyMason palette texture, with flat normals in the file. The 3MF keeps the exact colors. Models are in meters and stand on the ground at the origin. If you select them at the export step, you also get lower levels of detail, younger and dead versions, a stump, a felled trunk, chopped logs and billboards. GLB is next.
Does it work in Unity, Godot and Unreal?
Yes, all three import OBJ. The model is in meters with its base at the origin, the material library points at the palette texture for color, and the normals in the file are already flat, so there's nothing to fix after import. Unreal works in centimeters, so set its import scale to 100.
Why one palette for every model?
So a whole scene can share one material. Every tree, and later every rock and building, points at the same texture, which lets the engine batch them together. Recolor a block in the texture and everything that uses it changes. Every color the builder proposes has a block of its own, so it exports exactly as you see it. A color you pick yourself moves to the nearest block, usually by a few percent, and the 3MF keeps it exact.