VR experience for pediatric patients — step into the doctor's shoes before your procedure.

Built solo in 48 hours for the CareXR Hackathon 2026 at Shriners Hospitals for Children, Montreal.

Before You Go is a Meta Quest 3 VR application that helps children aged 5–14 understand medical procedures before they happen — by letting them perform the procedure themselves as the doctor.

The child enters a calm hospital waiting room, selects a procedure card, and is transported to a hospital room where they are the doctor. Step-by-step instructions guide them through each interaction — picking up tools, walking to the patient, and completing the procedure. When they sit in the real chair minutes later, nothing is a surprise.

Procedures implemented:

• 💉 Blood Draw — pick up syringe, walk to patient, inject highlighted spot on arm
• 🩹 Dressing Change — remove old bandage, grab new bandage roll, apply to wound

• Hospital lobby — Waiting room environment with animated title, Start and How It Works screens
• Procedure selection — 2 comic-style procedure cards with fade transition
• Blood Draw scene — Grabbable syringe, glowing injection spot, patient model swap on completion
• Dressing Change scene — Clickable old bandage removal, grabbable bandage roll, arm mesh collider detection
• Step-by-step UI — Comic-style instruction images float at eye level and update with each action
• Arrow pointer — Bobbing cyan arrow guides player to the next object
• Scene transitions — Custom fade in/out system using a sphere renderer
• Ambient audio — Hospital background music + button click sounds
• Controller interaction — Full XR Ray Interactor setup for UI and 3D object interaction

BeforeYouGo/
├── Assets/
│   ├── Audio/              # Ambient music, button click SFX, cheer sounds
│   ├── Images/             # Comic-style UI sprites (cards, instructions, title)
│   ├── Models/             # Hospital room, patient, syringe, bandage assets
│   ├── Resources/          # Materials (glow, fade sphere)
│   ├── Scenes/
│   │   ├── LobbyScene      # Main menu + procedure selection
│   │   ├── BloodDrawScene  # Blood draw procedure
│   │   └── DressingChangeScene  # Dressing change procedure
│   ├── Scripts/
│   │   ├── ArrowPointer.cs         # Bobbing arrow that points at target objects
│   │   ├── BloodDrawManager.cs     # Blood draw sequence controller
│   │   ├── BandageGrab.cs          # Bandage grab + arm activation
│   │   ├── DressingChangeManager.cs # Dressing change sequence controller
│   │   ├── FadeScreen.cs           # Fade in/out via sphere renderer
│   │   ├── FollowCamera.cs         # Instruction canvas follows player view
│   │   ├── GameStartMenu.cs        # Lobby menu controller
│   │   ├── ProcedureCard.cs        # Procedure card selection + scene load
│   │   ├── PulseGlow.cs            # Pulsing glow effect on interactable spots
│   │   ├── RemoveBandage.cs        # Old bandage click removal
│   │   ├── SceneTransitionManager.cs # Scene loading with fade
│   │   ├── StepManager.cs          # Step-by-step instruction image manager
│   │   └── SyringeGrab.cs          # Syringe grab + injection spot activation
│   └── Settings/           # URP render pipeline assets
├── Packages/
└── ProjectSettings/

• Meta Quest 3 headset
• Developer Mode enabled on headset
• ADB installed on your computer (via Android Studio or Platform Tools)

1. Clone the repo:

git clone https://github.com/AdamMTK-NB/BeforeYouGo.git

2. Connect Quest 3 via USB — accept the USB debugging prompt inside the headset

3. Install the APK:

adb install Builds/BeforeYouGo.apk

4. Find the app in your Quest library under Unknown Sources

• Unity 6.3 LTS
• Android Build Support module
• OpenJDK (included with Unity Hub)
• Meta Quest Developer Hub (optional, for wireless deployment)

1. Open project in Unity 6.3 LTS
2. File → Build Settings → select Android → Switch Platform
3. Connect Quest 3 via USB
4. Build & Run — Unity compiles and deploys directly to headset

• XR Plug-in Management → Android → OpenXR ✅
• Interaction Profiles → Meta Quest Touch Plus Controller ✅
• Texture Compression → ASTC
• Scripting Backend → IL2CPP
• Target Architecture → ARM64

XR Interaction complexity — Getting UI buttons, grabbable objects, and 3D interactables working simultaneously on the same controller required careful setup of Tracked Device Graphic Raycaster, XR Interaction Manager, and Input Action Manager together.

48-hour solo scope — Hard cuts were made throughout. Hand animations, biometric integration, and 3 additional procedure scenes were deferred in favor of a polished 2-procedure demo.

Child-appropriate design — Every instruction, interaction, and visual had to be friendly and non-threatening. The comic/cartoon visual language was iterated on multiple times.

Adam Maatouk Computer Engineering student at Concordia University LinkedIn · GitHub

Copyright © 2026 Adam Maatouk. All rights reserved.