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[PWB] Prefab World Builder - Advanced Level Design & Placement Tools


Take total control of your environment creation. Prefab World Builder (PWB) is the ultimate suite of advanced placement and editing tools designed to eliminate tedious manual workflows. Whether you are rapidly prototyping a scene or building a massive, detailed world, PWB streamlines your process so you can focus entirely on your creative vision.


Zero Runtime Overhead & Full Source Code. PWB runs 100% within the Unity Editor and provides full access to the source code. No assets or scripts from this package are included in your final builds, keeping your project completely clean and optimized.


🛡️ Reliable Support & Active Maintenance. Built for serious development, PWB is actively maintained with consistent updates. Join our active Discord community for direct support. You can expect an initial response to any inquiry within 24 hours, whether it's a quick answer to a workflow question or the start of hands-on troubleshooting for reported issues.


Documentation | Support Forum | Discord Server


🛠️ Advanced Prop Placement

  • Gravity Tool: Drop objects using physics for organic, natural-looking clutter and realistic scene dressing.
  • Brush Tool: Paint massive amounts of foliage, trees, and rocks instantly.
  • Pin Tool: Precision placement with instant shortcuts to rotate and scale. Automatically flatten terrain and clear details underneath new objects.
  • Line, Shape & Tiling Tools: Instantly generate fences, walls, or formations along customizable Bezier paths, geometric shapes (circles, triangles, squares, polygons), or quickly arrange props in tiled grid layouts.
  • Replacer & Eraser: Swiftly swap existing scene objects with new prefabs, or wipe areas clean just like using a 2D drawing app.

🏗️ Modular Environment & Grid Tools

  • Floor & Wall Tools: Instantly generate perfectly tiled floors and aligned walls to speed up your modular level design.
  • Advanced Grid Snapping: Build flawless modular environments with fully editable rectangular or radial grids, giving you total control over position, rotation, and spacing.

🎯 Smart Selection & Modification

  • Upgraded Transform Controls: Take full control of your selections. Rotate and scale with absolute precision using intuitive handles on bounding box corners, midpoints, or custom local points.
  • Extrude & Mirror Tools: Multiply your work instantly. Seamlessly extrude structural elements or mirror entire room setups in seconds to build massive levels faster.
  • Circle Select: Swiftly highlight and manipulate large groups of props within a custom radius, bypassing the limitations of standard box selection.

🎨 Intuitive Palette Management

  • Smart Prefab Palette: Drag and drop entire folders or individual prefabs directly from your Project or Hierarchy windows. Effortlessly manage massive libraries using advanced name and label filtering.
  • Advanced Brush Properties: Achieve organic, non-uniform environments instantly. Take absolute control over randomized rotation, scaling, offsets, and surface alignment (align to normals or stroke direction).
  • Multi-Brush System: Paint with multiple objects simultaneously. Instantiate prefabs using weighted random frequencies or set up precise, repeating sequence patterns.
  • Palette Picker: Keep your momentum going by switching active brushes simply by clicking an object already in your scene.
  • Thumbnail Editor: Keep your workspace beautiful and organized. Customize the orientation, scale, lighting, and background color of your prefab thumbnails directly in the palette.

▶️ See it in Action (Video Demonstrations):

Basic Workflow:

Advanced Tools: