How to Reset Specific Chunks with MCA Selector

Learn how to selectively reset chunks to regenerate terrain without resetting your entire world.

MCA Selector lets you delete specific chunks so they regenerate with fresh terrain. This is perfect for regenerating specific areas after a Minecraft update without losing builds elsewhere.

Resetting Chunks

Download your world

Access the XGamingServer panel, stop your server, and download your world.

Open in MCA Selector

Download and open MCA Selector. Go to File → Open and select your world's region folder.

Select chunks to reset

You can select chunks by:

Clicking individual chunks on the map
Drag-selecting a region
Using filters (Tools → Filter Chunks) to auto-select by criteria

Useful filter for regeneration:

InhabitedTime < 00:01:00

This selects chunks players spent less than 1 minute in.

Delete selected chunks

Go to Selection → Delete Selected Chunks (or press Delete).

Re-upload the world

Upload the modified world back to your server via Files.

Start your server

Deleted chunks will regenerate with current world generation when players explore them.

💡 Tip: Use this after major Minecraft updates to get new biomes and structures in unexplored areas while keeping your builds intact.

⚠️ Warning: Deleted chunks lose all blocks, chests, and entities. Double-check your selection before deleting. Create a backup via Backups first.

📝 Note: Chunk borders between old and new terrain may look unnatural (terrain cliffs). This is normal at the boundary between different world generation versions.