Support for the Nether and custom cave worlds are coming soon. I need to write a more clever slicer algorithm to render large halls instead of small caves above them.

When I first saw this Nether map today I had no idea what those grey artifical structures are.

Unmined was updating map of a huge world while I was writing the post on the same machine. CPU usage was around 70-80% according to Windows Task Manager and 320 MB of RAM were allocated. User interface elements were responsible, map was scrollable and fast, hard disk was working hard.

World properties:

• 20000 x 20000 blocks
• 9.66 GB folder size
• 1600 regions (40 x 40)
• map seed is 1758000052

World has been generated using Minecraft Land Generator. It’s a huge ocean, omg. Every single pixel representing one chunk (16 x 16 blocks) on this image, magnified area is 512 x 512 blocks wide and contains 1 pixel per block.

Results:

• 70 minutes map update time when opened first time
• 86 seconds map update time when reopened after playing and rebooting (without reboot it’s only 3 seconds because of OS disk cache)
• 61 seconds image rendering time (20480 x 20480 pixels, BMP, 1.6 GB)
• 367 MB cache folder size
• PNG export failed, BMP works

Test machine has Intel Core i5 2500 CPU with 4 cores, 4 GB RAM, 2 TB SATA hard drive spinning at 7200 RPM and Windows 7 64 bit.

New release is available for download.

What’s new in v0.2.115:

• (New) Live map

Live map feature of Unmined updates visible region of map immediately when Minecraft saves chunk data. This happens periodically while playing, and can be forced by entering the game menu for a few seconds (press ESC).