Accelerated Scene Dressing and Prefab Instancing
MeshBrush Unity 2.0.0 is a foundational editor extension for level designers who need to move beyond the slow process of dragging and dropping individual prefabs into a hierarchy. It transforms the workflow by allowing you to paint meshes directly onto any surface with a collider. From a technical standpoint, MeshBrush is more than a simple placement tool; it is a sophisticated instancing engine that handles random transforms, scale variance, and orientation alignment on the fly, significantly reducing the time spent on environmental set-dressing.
Integration Tips
- Collider Requirements: MeshBrush Unity relies on Raycasting to determine placement. Ensure your target surfaces (ground, walls, etc.) have valid Colliders. If you are painting on complex terrain, use a simplified Mesh Collider to keep the editor’s physics calculations performant during the painting process.
- Layer Management: Utilize the Layer Mask feature in the MeshBrush inspector. By excluding layers like “Triggers” or “Water,” you prevent the brush from accidentally placing grass or debris on invisible logic volumes or surfaces where they don’t belong.
- Optimization via Combining: Use the “Combine painted meshes” function once your layout is finalized. This is vital for performance as it batches many small meshes into a single mesh, significantly lowering draw calls. However, remember that combined meshes are no longer individual prefabs, so keep a “source” group hidden if you anticipate future edits.
- Template Sharing: If you are working in a team, save your brush configurations as templates (.xml). This ensures that every artist uses the same scale and rotation jitter for specific environmental assets, maintaining visual consistency across different scenes.
Best Use Cases
- Open World Foliage Placement: For projects requiring dense vegetation, MeshBrush is superior to standard terrain trees when you need specific prefab logic (like custom shaders or interaction scripts) attached to every blade of grass or shrub. The randomization parameters ensure that no two areas look identical.
- Hard-Surface Greebling: In sci-fi or industrial environments, use MeshBrush to quickly add small details like bolts, pipes, and panels to large structural prefabs. This allows you to create high-detail surfaces while keeping your base geometry simple and efficient for the occlusion culling system.