Write and Reveal Secret Messages with Invisible Signs and UV Light

Creating Invisible Signs

Place a sign block and right-click it to write your message. The sign will appear completely invisible in normal lighting conditions, creating a mysterious element for your adventure map.

Revealing Messages with UV Light

Craft or obtain a UV light tool. Point it at invisible signs and right-click to illuminate them. The hidden message will suddenly become visible, revealing clues, warnings, or story elements to players.

Design Ideas for Secret Messages

• Hide clues about trap locations or safe routes throughout your map
• Write story elements that unfold as players explore, building atmosphere
• Place invisible signs in unexpected locations—inside cupboards, behind boarded doors, or in dark basements
• Use UV lights as rewards for thorough exploration, encouraging players to search every corner
• Create puzzle chains where one invisible sign's message points to the location of another

This mechanic is perfect for creating immersive Hello Neighbor-themed adventure maps where players must actively investigate their environment to progress.