Godot Mobile Terrain Editor by Stefan Lacio

Lightweight terrain sculpting plugin for Godot 4.x, designed for the Godot Mobile Editor and low-spec / 32-bit Android devices. No GDExtension, C#, or native binaries — GDScript tools plus one Godot shader for splat blending.

Features

• No GDExtension, C#, or native .so libraries
• Half-float heightmaps (FORMAT_RH) for low RAM use
• Clockwise mesh winding + broad custom AABB (top-down friendly)
• Adaptive collision (only near the camera)
• Localized brush sculpting with frame-throttled mesh rebuilds
• Undo / Redo (16 steps)
• Procedural FBM random terrain generation
• Full material override (StandardMaterial3D, ShaderMaterial, ORM, …)
• UV scale and offset tiling
• Splatmap texture painting (up to 4 layers)
• Paint brush mode for layer blending
• Mobile-first sidebar UI (large touch targets, scrollable)
• Works on 32-bit and 64-bit Android

Install

1. Download and extract so you have res://addons/terrain_editor/
2. Project → Project Settings → Plugins → enable Terrain Editor
3. Add a TerrainManager node to a 3D scene

Usage

1. Select TerrainManager — the sidebar appears on the right
2. Touch-drag or mouse-drag to sculpt (Raise / Lower / Smooth / Flatten / Paint)
3. Optional: assign a material under Terrain Material in the Inspector
4. For texture paint: enable Splatmap, assign Splat Texture 0–3, use Paint mode
5. Save the scene after sculpting so Play mode keeps the heightmap
6. Optional: Utility → Quick Save → res://terrain_heightmap.exr

License

MIT — Stefan Lacio, 2026