Terraria’s Corruption actually spreads 6x faster on the surface. Why?

Why does the Corruption spread 6x faster on the surface?
Holy hell!
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#terraria

Why does the Corruption spread 6x faster on the surface?

30 Comments

  1. Slight correction: Walls CANNOT spread infection to solid blocks. Blocks can infect blocks, blocks can infect walls, and walls can infect walls with some restrictions. Walls will never spread back to blocks. In the example shown in the video at 0:15, notice that the blocks in the area highlighted to be in the walls' infection range only get infected after the pre-placed corrupt grass and ebonstone spread close enough to infect those blocks via other solid blocks.

  2. Another thing to consider: most blocks in the surface are going to be air, which doesn't corrupt anything. So if it's chosen to update, nothing happens. Inversely, most of the underground and caverns is made of stone blocks, which are corruptable. If both the surface and underground had the same update rate, the underground would BLOW past everything when updating, since a majority of updates would choose a block that's evil, and make it spread. It would start slowly when there's only a few evil blocks, but then it'll grow exponentially and there'd likely be no stopping it. until you got the Clentaminator.

  3. THIS EXPLAINS WHY GEM TREES SUCK SO MUCH TO FARM

    This explains so much… evil spread is the least of the implications of tiered update speed by depth to me

  4. this is kind of a different topic but does that mean tree growth is based on this randomness along with grass or other growing/changing tiles? Nevermind you answer this in the video LOL serves me right.

  5. Are the corruption spread and NPC housing only notable mechanics affected by 2x quicker tile update rate of the surface blocks? Does it also affect grass & vines growth, monsters spawn rates near the surface – underground bound?

  6. They need to add the option to turn off biome spread on every mode not just journey. Its such an annoying mechanic that wastes hours of your time

  7. I'd be interested in some discussion on /why/ this mechanic is in place at all, as it's not intuitively obvious at all why the devs would do so

  8. Never knew this since I usually play with corruption off – I just don't like being punished for playing the game to its fullest. Thanks for making the video!

  9. I'm glad my habit of making a small ditch on both sides of the corruption before I can totally isolated it has unironically been paying off

  10. I assume the game updates in layers starting from the top to the bottom. I feel like it’s impractical to update the entire world all at once so going in sections would improve performance. Every tick could be running checks and stopping once one passes. I could be wrong and the game actually chooses from the entire list, prioritizing surface blocks.

  11. General Relativity is broken on Terraria, I guess.

    That 'footnote' at the top left in the 'getfixedboi' world explained why my FPS was about half of what it should be in my last 2 Legendary playthroughs.