Spline Architect: Terrain Tools — A professional Unity extension for creating and editing spline-based terrain features quickly and precisely. Build roads, rivers, fences, paths, and ridgelines with procedural mesh generation, adaptive UVs, collision, and LOD support. The intuitive editor offers brushes, snapping, bezier handles, runtime deformation, terrain stamping, and vegetation/decoration placement along splines with density controls. Optimized for performance with batching and GPU instancing, supports HDRP, URP and Built-in pipelines, and includes a runtime API, usage examples, and documentation to accelerate level design and procedural world workflows.