Board Thread:Off Topic Board/@comment-24025739-20150322024203/@comment-26021579-20150405141012

Coriidor5 wrote: Yes, actually

You dig a Hellavator 4 blocks wide. The Corruption or Hallowfication will only grow to 3 blocks away, not 4. If you want, you can purge your world entirely by:

Harvesting 1 mud block from the Hallow and the Corruption, save it in a chest. After that, dig trenches all the way down, every 50 blocks. Use that one gun that shoots biome controlling sprays, and use the pure spray. This will purge your world, then you can create controlled enviroments with the samples you harvested.

The person below me is a ninja You can also youse perfection powder from the Dryad.