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Getting started & Basic Navigation

Vicious Squid edited this page Jun 3, 2026 · 11 revisions

Fio is a hybrid 2D/3D level editor and engine designed for rapid block-out, logic wiring, and gameplay testing.

This page covers the absolute basics of navigating the viewport and managing your project.

Viewport Controls & Camera

Navigating the 3D viewport requires a combination of mouse and keyboard inputs:

  • Free Camera / Mouselook: Hold the Right Mouse Button and use W, A, S, D to fly around the 3D viewport.

  • Vertical Movement: Space to move the camera straight up, C to move straight down
    (when nothing is selected)

  • Zoom: Use the Mouse Wheel to zoom in and out in both 2D and 3D views.

  • Click or SHIFT-Click to select things. ESC to deselect.

  • Hold left mouse to drag out a box in the 2D view and click the ROOM button image to instantly make a room.

  • Right click inside the room and select PlayerStart from the menu to create a player spawn. Click Play to enter the game.


Global Keyboard Shortcuts

  • Ctrl + Tab: Cycle through the 2D viewpanes (Top, Side, Front)
  • F1: Toggle connection lines (Logic Links) visibility
  • F2: Toggle Wireframe render mode
  • F3: Toggle the System Monitor overlay
  • F5: Enter/Exit Play Mode
  • ` (Tilde): Show the debug Console
  • T: Toggle the Asset Browser
  • Ctrl + Shift + R: Reset UI layout

Toolbar

1. Room

Create a room from the selected brush. Light entities will be placed automatically.

2. Hollow

Hollow the selected brush (with specified wall thickness)

3. Clone

Duplicate the selected brush (keyboard shortcut: SPACE)

4. Rotate

Rotate the selected brush 90 degrees (relative to the current 2D view)

5. Subtract

Subtract the selected brush from any brushes that touch it (CSG subtraction)

6. Tint

Apply a tint to the selected brush

7. Tools menu

  • Visual Scripting Wizards
  • Logic Validator
  • Terrain Generator
  • Procedural level generator

8. 3D Grid

Show/Hide the 3D Grid

9. PLAY

Launch into Play Mode

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