3D text on arcs, rings and Unity Splines

Searching for Unity text along a spline turns up two different wishes. One is a row of letters that follows a path: a word around a ring, a banner along a road, a title spiraling into the distance. The other is a solid word whose body curls through space like a ribbon. Curved-text tools for TextMeshPro only do the first, and they bend flat letters.

Text Studio 3D does both with solid letters and keeps them as separate settings: placement decides where each glyph sits, an extrusion sweep bends each glyph from front to back, and deformers reshape the finished geometry. The cover shows lettering arranged on rings and a helix in space. For flat curved TextMeshPro and UI text, curved text with Text Studio is the better fit and needs no 3D geometry.

Two kinds of curved 3D text

All three can be active at once. If a line follows a curve but each letter’s depth stays straight, the text uses placement, not a sweep.

Place 3D text along arcs, rings, helixes and splines

Text Studio’s Placement tab moves glyph baselines along a Linear, Arc, Circle, Wave, Grid, Curve or Spline layout, and Text Studio 3D builds the solid letters wherever the glyphs land. Spline placement follows a Unity Splines path through Text Studio’s optional Unity Splines integration.

Each letter of BEND sits on an arc and leans with it.

For forms that use all three dimensions, add Text Studio > 3D > Spatial Placement through Add Component and choose Use Spatial 3D Placement. It adds six forms: Helix, Cylinder, Sphere Band, Tunnel, Staircase and Spatial Grid. Choose Polished Starting Point… applies the DNA Helix, Hero Carousel, Globe Band, Tunnel Spiral, Dimensional Stair and Voxel Wall presets, which change placement and orientation only. Keep Original, Follow Path, Face Outward and Face Inward decide how the letters face, and Reverse and Fine Rotation fix the reading direction. Cylinder and Sphere Band read from the outside by default; AutoFitRadius grows a curved form so the letters keep their spacing.

Spatial Placement configured as a layered voxel grid.

Since 1.4.0, scripts control the same values, on a text that already uses Spatial 3D placement:

using TextStudio.ThreeD;
using UnityEngine;

public class HelixTitle : MonoBehaviour
{
    [SerializeField] TextStudio3DSpatialPlacement placement;

    void Start()
    {
        placement.ApplyPreset(TextStudio3DPlacementPreset.DnaHelix);
        placement.Turns = 2f;
        placement.Radius = 1.5f;
    }
}

Bend each letter along a Bezier or Unity Splines sweep

An extrusion sweep curves each glyph from its back face to its front face, so the letters themselves become arches, ribbons or hooks.

• Quadratic Bezier. Use Create Quadratic Extrusion Path in the inspector’s Depth Extrusion Sweep section, or Assets > Create > Text Studio > 3D > Geometry > Quadratic Extrusion Path, then set Body Sweep to Path on the layer. Starting shapes include Straight, Side Bend, Lift and Ribbon. Back-face Start, Curve Control and Front-face End shape the curve, Arc Samples sets its smoothness, and Bank, Roll Through Sweep, Back Scale and Front Scale roll and taper the body along it.
• Unity Splines. Install Unity Splines 2.0.0 or newer and support activates automatically. Add Text Studio > 3D > Spline Extrusion Path Provider, assign a SplineContainer and set Body Sweep to Path. The provider samples the spline with rotation-minimizing frames, optional knot banking, roll, endpoint scale and closed paths, and refreshes when knots or transforms change. The optional integration package adds only a showcase.

A quadratic sweep: the top view shows the side bend, the side view the lift.

Bend, twist and taper the finished letters

A Deformer Stack (Assets > Create > Text Studio > 3D > Modules > Deformer Stack), attached with Create Module or Attach Existing in the 3D Modules section, applies ordered Bend, Arc, Shear, Pinch, Flare, Spherize, Cylindrical Wrap, Wave, Noise and Twist operations in Glyph, Word, Line, Text, Object or World space, with automatic or custom bounds and falloff. Order matters: a bend followed by a twist is not the same shape as a twist followed by a bend. On a layer, Taper, Twist & Bulge shapes the body itself. In combined, chunked or hybrid output, warmed built-in deformation updates the visible mesh without rebuilding its topology, which keeps an animated bend cheaper than a rebuild.

Twisted and tapered bodies from the built-in depth styles.

Limits worth knowing

• Prepared only needs stable paths. A mutable extrusion path without a durable identity cannot use reusable prepared geometry; snapshot it, give it a stable identity or keep Generate if missing.
• Swept layers prepare per depth. Layers with an extrusion path store geometry for each exact depth, and hidden path-swept text must be shown once before it can be prepared.
• Detail stays authored. Automatic Quality keeps the authored mesh on text with an extrusion path or a deformer.
• Reading direction. On a cylinder or sphere band, Face Inward reads from the center; use Reverse when a ring reads backwards.

Menus can use the same idea: Control Layout arranges spatial controls on circular, spline and volume forms, as covered in 3D menus and world-space UI. The Placement in Space sample compares placement, spatial forms and front-to-back sweeps on one text, and the manual chapters Arrange Text in Space and Use 3D Modules list every setting.