Godot 4: 3D Room Placement & Stacking — Grid Placement Plugin Tutorial

Build a 3D room placement system in Godot 4 — rooms that snap to a grid, stack on each other, and get their wiring handled per level.

🎮 Get the Grid Placement plugin: https://chris-tutorials.itch.io/grid-placement-godot
📖 Written version of the same setup, step by step: https://christutorials.com/articles/how-to-place-and-stack-rooms-in-a-3d-grid-in-godot/

In this video:
• Instancing the grid placement host and the two nodes it needs
• Pulling those nodes into your level so the wiring is handled automatically
• The session resource, its catalog, and one scene placement entry per room size
• Placement profiles and a snap profile — what the rules live in, and why
• Ground and room snapping, so a room stacks on the one beneath it
• Setting up the placement UI, bundle actions and input actions
• Require column support, then building a three-storey stack live

Chapters:
0:00 Rooms going up
0:22 Install the plugin and instance the nodes
0:52 Per-level wiring with a placement level context
1:29 Placement owner and grid positioner
1:53 The session resource and its catalog
2:11 Scene placement entries
3:15 Placement profiles
3:46 The snap profile
4:02 Duplicate the entry for each room size
4:49 Set up the placement UI
5:25 Bundle actions and input actions
6:11 Bundle scene references
6:45 Require column support, then build
7:14 Follow-up plans and outro

Plugin guides & API docs: https://grid-placement.pages.dev/

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