This Geometry Nodes setup generates custom 3D terrain based on user-drawn curves. Users can draw out paths to immediately generate terrain meshes, with parameters to adjust mesh thickness, overall resolution, and subdivision levels for both high-detail renders and fast low-resolution editing.

The system includes an automatic shader setup that applies grass, dirt, and stone textures based on the angle and slope of the generated geometry, featuring adjustable blend overlays. A dedicated river integration tool allows users to draw river curves that automatically deform the underlying terrain. The river system includes controls for water width, z-axis offset, water mesh resolution, and a specific bend parameter designed for creating waterfall effects.