How Deep Does Crimson Go? Understanding Crimson Spread in Terraria
Fast answer first. Then use the tabs or video for more detail.
- Watch the video explanation below for a faster overview.
- Game mechanics may change with updates or patches.
- Use this block to get the short answer without scrolling the whole page.
- Read the FAQ section if the article has one.
- Use the table of contents to jump straight to the detailed section you need.
- Watch the video first, then skim the article for specifics.
The Crimson, one of Terraria’s two world-evil biomes, is a formidable force that can significantly alter your game world. Understanding its mechanics, especially its depth, is crucial for any player looking to control its spread and protect their creations. So, let’s cut to the chase: Crimson, like Corruption and Hallow, can spread all the way down to the very bottom of your world, reaching the Underworld (Hell). There is no limit to its vertical reach. This means that if not properly contained, the Crimson has the potential to corrupt the entire underground landscape of your world.
Crimson’s Vertical Reach: More Than Just the Surface
The Crimson is not just a surface-level threat. While you’ll typically encounter it near your spawn point or in specific regions of your world generation, its insidious creep extends far beyond what is visible. It operates both horizontally and vertically, following a few simple rules. The initial spread you see at world generation is just the tip of the iceberg.
How the Crimson Spreads
The primary mechanism for Crimson spread involves direct block-to-block conversion. Crimson grass, grown from Crimstone blocks, has the ability to convert adjacent dirt, sand, or stone blocks into their Crimson counterparts. This conversion can occur up to three blocks away in any direction.
Another significant factor is the growth of Crimson thorns. These thorny bushes grow from Crimson grass and can extend a considerable distance, spreading the Crimson even over non-corruptible blocks. This is particularly dangerous in the early game, as it enables the Crimson to bypass small barriers. Crimson vines also grow downward from Crimson grass blocks when space is available, further extending the vertical reach.
Finally, breaking altars also contributes to the spread of the Crimson. Each time you smash an altar in the early-to-mid game to create hardmode ores, a random stone block in the cavern layer of your world is converted to Crimstone, which then spawns more Crimson.
The Vertical Implications
Because the Crimson can spread to any dirt, stone, or sand block, its reach is theoretically infinite, all the way to the Underworld. It doesn’t matter how deep you dig or build; the Crimson will continue to spread along the path of convertable blocks. This makes controlling its spread very difficult without proper planning and preparation. Even if you clear a section of the Crimson near the surface, it can still be spreading aggressively deeper down.
Frequently Asked Questions (FAQs)
Here are some common questions about Crimson spread, with the information you need to effectively manage it:
1. What is the minimum width of a tunnel to stop Crimson spread?
While a 3-block wide tunnel can technically stop the direct block-to-block conversion, a 4 block wide channel is recommended to account for Crimson thorns. Most veterans prefer to create tunnels that are 6 blocks wide, and use non-convertable blocks for maximum prevention.
2. Does Crimson spread through water?
No, Crimson does not directly spread through water. However, it can spread to solid blocks bordering the water. If the water creates a gap in solid blocks, it might slow the spread but won’t stop it entirely. Be sure any blocks touching the water are not convertable.
3. Can Crimson spread through walls?
Yes, Crimson can spread through Grass Walls, Flower Walls, and Jungle Walls. This is a significant issue during Hardmode. You can prevent this by making sure the walls are of non-convertable materials.
4. Can Crimson take over the Jungle biome?
Yes, absolutely. The Jungle is susceptible to corruption by the Crimson, especially in Hardmode. This is a major problem because it can make essential jungle items difficult to acquire.
5. Can the Hallow stop Crimson spread?
The Hallow cannot be infected by the Crimson or Corruption. However, Crimson cannot spread over the Hallow. They effectively cancel each other out.
6. How do I permanently stop Crimson spread?
The most effective method is to create a sufficiently wide tunnel (ideally 6 blocks) around the entire Crimson biome, filling it with non-convertible blocks like wood, clay, or gray brick. This ensures the Crimson cannot bypass the barrier.
7. Can Crimson spread through wood or stone brick?
Yes, Crimson can spread through placed and living wood and stone brick. These materials don’t offer any protection, so you need to use more reliable barriers.
8. Do sunflowers prevent Crimson spread?
Sunflowers do offer limited protection, as the two tiles directly underneath them cannot be converted. Sunflowers can also decrease an area’s corruption rating, but these should be treated as temporary protection.
9. Can Crimson spread through thorns?
Yes, thorny bushes grown from Crimson grass are a major spreader of corruption. They can bypass normal barriers and convert more blocks, which is why a 4 block gap is necessary when making trenches.
10. Can Crimson spread to snow biomes?
Yes, it can. Crimson can create Crimson Snow biomes when it spreads into a Snow biome during Hardmode. While Snow is not convertible, Ice can be converted into Red Ice, which then can continue the spread of the Crimson.
11. Does breaking Demon Altars cause more Crimson spread?
Yes, breaking Demon or Crimson Altars has a 66.67% chance of converting a random stone block in the cavern layer to Crimstone, further facilitating spread of Crimson.
12. Can Crimson spread to Mushroom biomes?
Yes, but not directly to the mushroom grass. Crimson will turn the mud of a mushroom biome into dirt. This will destroy the mushroom grass and then the Crimson can spread on the newly converted dirt.
13. What can break Crimstone?
Crimstone, the primary block of the Crimson biome, can only be broken with a Nightmare Pickaxe or a better pickaxe. You will need to get to the Underworld in order to craft the required equipment to mine the Crimstone.
14. Can Crimson spread over moss?
No, the color of the moss on stone is irrelevant. Only the stone is susceptible to corruption. Red Moss from the underground cavern cannot spread the Crimson or corruption.
15. How can I get rid of Crimson blocks?
You can use Purification Powder from the Dryad NPC, bomb it, or mine it with a Nightmare Pickaxe or better. The Clentaminator/Terraformer with Green Solution can also be used to purify larger areas very quickly.
Understanding the depths to which the Crimson can spread, coupled with the countermeasures available, will be key to maintaining control over your Terraria world. Be proactive, and your world will be safe from the Crimson menace!