FlexiPlace - Object Placement System & Overlap Validation

FlexiPlace is a modular object pickup and placement system for Unity. It uses raycast-based detection instead of a grid, giving players complete freedom to position objects anywhere in the world — exactly like placement mechanics seen in supermarket, cafe, and simulator-genre games.

When a player picks up an object, a real-time ghost preview follows the cursor. The preview material switches between green (valid) and red (restricted) based on Physics.OverlapBox checks — no grid snapping, no tile constraints.

The system is split into four focused scripts, each with a single responsibility, making it easy to extend or integrate into any existing project. Setup takes under ten minutes with the included step-by-step documentation.

A demo scene is included featuring a first-person setup so you can test the system immediately after import. Please note: the 3D assets visible in the preview video are not included in the package — the demo scene uses basic placeholder geometry only.

• No grid required. Full freedom placement using raycasting. 
• Real-time ghost/preview object with automatic material swapping. 
• Green/red crosshair feedback driven by PlacementValidator. 
• Physics.OverlapBox collision checks for accurate placement validation.
• Restricted layer and optional Allowed layer support for fine-grained control. Scene Gizmo: wire-cube visualisation of mesh bounds (green/red) in the Unity Editor. 
• Cancel placement returns the object to its original position and rotation. 
• Plug-and-play: assign a few Inspector fields and it works immediately. 
• Full C# source code included — clean namespace, no third-party dependencies. 
• Compatible with Legacy Input System. Unity 2021.3 LTS and above.