Do fences prevent mobs from spawning in Terraria?

Yes, fences act as background walls and do prevent most normal mobs from spawning in the tile directly in front of them, but enemies can spawn on top of the fence or in any open air above it and then drop down, so you need a solid roof or a complete wall structure to fully block spawns. For true spawn prevention, especially in [[#building|building]] areas, you must cover the entire spawn range with solid walls or use NPCs to reduce spawn rates.
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What prevents mobs from spawning in Terraria?

Enemy spawns are suppressed near friendly NPCs, including not only the "town" NPCs, but the Traveling Merchant and the Skeleton Merchant. If there are three friendly NPCs on screen, no enemies will spawn. Friendly NPC presence does not affect spawning during events such as the Blood Moon or invasions.
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Can mobs spawn in fenced areas?

A large area can be made resistant to hostile mobs, by enclosing it with an unbroken fence line, and lighting the inside portion heavily. This keeps any monsters from spawning within the fenced area, and keeps most hostile mobs that spawn outside, from coming in.
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What does fence do in Terraria?

In Terraria, fences are decorative background blocks that act like walls by blocking enemy spawns but have unique properties: they allow certain plants (like trees, flowers, mushrooms) to grow through them and can be used as part of valid NPC housing, offering a visually lighter alternative to solid walls for aesthetics or farm enclosures.
 
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Do fences keep mobs out?

Fences are extremely good at one thing – keeping two areas separated from each other. Players and mobs, both friendly and hostile, can't jump over them unless they have a jump boost enchantment.
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How a Hardmode Statue breaks pre-hardmode. PTL#2

Do fences stop mobs from spawning in Terraria?

Fences stop monsters from spawning just like any other wall, but do not restrict tree, mushroom or plant growth.
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What blocks can mobs not spawn on?

Mobs can't spawn on transparent blocks (glass, ice, leaves), partial blocks (bottom slabs, stairs, carpets, fences, pressure plates, buttons, rails, trapdoors), or certain functional blocks like farmlands, beds, and magma blocks (except specific mobs), generally requiring a full, opaque, solid surface to spawn on, though exceptions exist like soul sand or slime blocks. 
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Do walls stop biome spread in Terraria?

Spreading tiles can spread their biome even if there are non-corruptible blocks "in the way". For example, a one-block-wide wall of Wood between a Corrupt grass block and a pure grass block in Hardmode will not prevent the grass from being converted because the Corrupt grass can convert any tile within three tiles.
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Are fences worth it?

If you're making decisions with resale in mind, it's worth knowing whether a fence will boost your bottom line or just eat up your weekend. Here's the short answer: A solid, well-built fence can return 30% to 70% of what you paid and help your home sell over two weeks faster than one without a fence.
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What blocks do fences not connect to?

A fence occupies the center space of blocks and automatically connects to any solid block that is placed next to it. Wooden fences connect to other wooden fences, but do not connect to Nether brick fences.
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Can mobs see me through fences?

Yes, in Minecraft, hostile mobs can see through fences because they have a form of "x-ray" vision and can track players through the gaps, even though they can't jump over them, making fences useful for containment but not for hiding line-of-sight for ranged attacks. Mobs will try to pathfind to you through the fence openings, but ranged mobs like skeletons can't shoot through the fence blocks themselves, only the gaps. 
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How to prevent mobs from spawning in an area?

To stop mobs from spawning, you can use light (torches, glowstone), solid/transparent blocks (slabs, string), special blocks (Nether Wart Blocks for Nether mobs), or game mechanics like WorldGuard plugins on servers, command blocks (lighting, killing mobs), or specific items (Wards in Portal Knights). The best method depends on whether you're in vanilla Survival (light/blocks) or have server/cheat access (commands/plugins). 
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Do mobs despawn if they are in a fence?

As the title states, passive mobs shouldn't despawn if they're within a fenced area. In particular, the max size of the fencing would be 20 x 20.
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What makes enemies spawn less in Terraria?

The Peace Candle is a furniture item that can be placed or held to decrease enemy and critter spawn rates in the area, and emits a low amount of light. When placed, it gives nearby players the Peace Candle buff. Holding a Peace Candle does not cause the buff icon to display, but still causes an identical effect.
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What doors can zombies not open in Terraria?

Doors will not open for Zombies during a Blood Moon, any Skeletons underground, or Hardmode enemies that can open up single doors by bashing on them, as the other door will block them from opening them inward.
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Can enemies spawn on conveyor belts Terraria?

Enemies can spawn on Conveyor Belts. The game will use the first non-Conveyor Belt block downwards in a 30 tiles range when determining what type of enemy to spawn.
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What are the downsides of fences?

Expensive Installation and Maintenance: One of the main drawbacks of having a fenced-in yard is the cost associated with installation and maintenance. Depending on the size, materials used, and any additional features, such as gates or decorative elements, the expenses can add up quickly.
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What are the cons of fencing?

This article explores the five major drawbacks of installing a fence; the cost of installation and ongoing maintenance, aesthetics and landscape impact, potential limitation of property access, local regulations and restrictions, and the impact on neighbor relations.
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Do I need permission for a 6ft fence?

You need planning permission if your fence height including trellis exceeds 2 metres (6.56ft) above ground level. If your fence height is higher that 1 metre (3.28ft) and you live next to a highway used by vehicles or the pedestrian footpath of such highway, then you need planning permission.
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Are gray bricks corruptible?

Gray Brick is a basic brick. It is often used in construction, as it requires only common Stone blocks to produce and, unlike its constituent materials, is resistant to the spread of Corruption, Crimson, and Hallow.
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How big of a gap to stop Corruption in Terraria?

To stop Corruption (and Crimson/Hallow) spread in Terraria, dig a 4-block wide tunnel around your area and line it with non-corruptible blocks like wood, clay, or bricks to block natural spread; for surface areas with thorny vines, a wider 6-block gap is safer to prevent vines from bridging the gap, though filling the tunnel with uncorruptible blocks is the best method to guarantee safety, say forum users https://forums.terraria.org/index.php?threads/corruption-and-crimson-how-fast-does-it-spread./85237/ and gamers. The core principle is that corruption spreads up to 3 blocks, but thorny vines (which grow from corrupted grass) can reach 6 blocks, so a wide tunnel or barrier is essential.
 
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Do soul torches stop mobs from spawning?

No, soul torches don't stop all mob spawning by increasing light levels like regular torches; they have a lower light level (10) and can even attract some undead mobs, but they do have special properties, like repelling Piglins and being useful for Nether spawn-proofing by preventing Nether mobs from spawning in low light areas, especially when used with soul lanterns or other soul-based mechanics in recent updates, making them good for specific, niche spawn-proofing in the Nether and Overworld.
 
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What items stop mobs from spawning?

Mobs in Minecraft can't spawn on transparent blocks, upside-down stairs, bottom-half slabs, carpets, rails, leaves, and most non-full blocks; they need a solid, full block surface (or specific conditions like soul sand/slime blocks), but exceptions exist like spawners and aquatic mobs, with lighting and solid obstructions being key for general prevention.
 
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