Spline Architect - Terrain Tools

About Spline Architect - Terrain Tools – Unity Editor Tool & Plugin

Unity Terrain Spline Tools

Spline Architect - Terrain Tools is an addon for Spline Architect that extends Unity's Terrain workflow with spline-based deformation, painting, and object spawning. It supports multiple terrains, including high-resolution 4K terrains, while keeping terrain edits non-destructive.

Terrain Deformation

Terrain deformation provides controls for spline width, blend width, easing, and erosion. Individual control points can adjust saddle skew, contrast, rotation, noise strength, and center smoothing, while up to 8 range fields can target specific spline segments. Paths can also be carved into stamped terrain alongside Unity's Terrain tools.

The tool supports up to 16 noise layers for terrain deformation, painting, and object spawning. Its terrain processing is multithreaded and uses Unity Burst.

Terrain Painting and Spawning

Each spline can contain up to 16 terrain-painting layers with controls for width, blend width, easing, noise, slope filtering, slope blending, and range. GameObject positions can act as masks, while individual control points can modify painting width, offset, and blending. Painting data is stored directly in the spline and works alongside Unity's terrain painting system.

For object placement, prefabs or existing scene objects can be spawned along splines using up to 16 instancing layers. Spacing, probability, distance from the spline, slope, random rotation, and scale can be configured, with per-control-point settings for scale, height, and probability.

Compatibility and Requirements

Terrain Tools is compatible with the Built-in Render Pipeline, URP, and HDRP. It supports Unity 2022 and Unity 6000 across these render pipelines. The addon requires the Collections package, with a minimum version of 2022.3.62f2, and Spline Architect is required as its base package.

The tool is editor-only and does not extend the Spline Architect API for runtime usage. When updating the addon, the corresponding base version of Spline Architect should also be checked for updates.

Use Cases

• Landscape workflows where mountains, paths, and rivers need to follow editable splines.
• Terrain painting workflows requiring multiple layers, masks, noise, and slope filtering along spline paths.
• Scenes where vegetation or other prefabs need to be distributed along splines with configurable placement rules.
• Projects working with multiple terrains or high-resolution 4K terrain setups inside the Unity Editor.

Developers Who Downloaded This Also Downloaded

Related Unity Tools Assets