3D World Building

Expert guidance for level design with GridMaps, CSG, and environmental setup.

NEVER Do

• NEVER forget to bake GridMap navigation — GridMaps don't auto-generate navigation meshes. Use EditorPlugin or manual NavigationRegion3D.
• NEVER use CSG for final game geometry — CSG is for prototyping. Convert to static meshes for performance (use "Bake CSG Mesh" in editor).
• NEVER scale GridMap cell size after placing tiles — Changing cell_size doesn't update existing tiles, causing misalignment. Set it once at the start.
• NEVER use MeshLibrary without collision shapes — Items without collision spawn visual-only geometry that players fall through.
• NEVER enable volumetric fog without DirectionalLight3D — Volumetric fog requires at least one light to scatter. No lights = no visible fog.

Available Scripts

MANDATORY: Read the appropriate script before implementing the corresponding pattern.