Troubleshoot Light Not Updating After Building Changes

Why Light Doesn't Update Immediately

Just Like Rays Mod stores light data in your world save file. When you add, remove, or move blocks, the mod must recalculate which light rays reach each space. Sometimes this doesn't happen automatically, leaving old shadow patterns in place.

Fixing Stale Light Data

1. Save and close your world. Exit to the main menu to ensure all changes are written to disk.

2. Open World Settings. From the world selection menu, highlight your world and click Edit.

3. Optimize the world. Select the Optimize World button.

4. Erase Cached Data. Choose this option to clear stored light calculations and force a full recalculation.

5. **Reload your world. You may see a brief loading period.

6. Check your changes. Shadows and light halos should now reflect your new block placements.

If problems persist after optimization, try backing up your save and creating a test world to confirm the mod is working correctly.