Castle Whisper — AR Markers Pack
Generated Sat, Nov 7, 2026 6:06 AM
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INSTRUCTIONS FOR USE:
1. These markers are used by the Castle Whisper AR camera to display
   3D heritage landmarks and William Kellie-Smith.
2. Print markers on white paper (recommended size: 12-15 cm).
   IMPORTANT: Do not trim the white border (quiet zone) around the black box.
3. Screen-based alternative: Open the marker image on a monitor / laptop / tablet / second phone,
   then point the explorer phone's AR camera at that screen.
4. Hiro marker (hiro/hiro-universal-fallback.png) is also supported as a universal fallback.

CHECKPOINTS & MARKERS LIST:
Checkpoint 1: Main Entrance | Barcode ID: 3
Checkpoint 2: Corridor / Construction Area | Barcode ID: 12
Checkpoint 3: Lift Area / Secret Tunnel | Barcode ID: 23
Checkpoint 4: Rooftop | Barcode ID: 33
Checkpoint 5: Unfinished Building | Barcode ID: 57

Universal Fallback: Hiro Marker (hiro/hiro-universal-fallback.png)
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