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1.3.1 is an update which added trading, adventure mode, new generated structures (jungle and desert temples) and new blocks/items including emeralds, book and quills, written books, tripwire and ender chests. It also improved enchanting and made fighting Creepers harder.

Additions

General

Demo mode
  • Lasts 5 game days per world.
  • Singleplayer only.
Options
  • Chat Settings
    • Change which parts of chat are shown and how opaque it is.
    • Toggle chat colors, links being clickable and warning prompts for links.
    • Option to rebind the command key, which opens the chat with / in the textfield.
  • Snooper Settings
    • Allows users to toggle anonymous data being sent to Mojang.
    • Shows which data will be sent.
  • Video options
    • Have to be toggled manually in options.txt for now.
    • Vertical Synchronization.
    • Fullscreen mode can now be enabled at startup.
  • Added setting to disable servers offering you texture packs
Large biomes world type
  • Generated as default worlds, but 16x bigger
  • Beaches look closely to what they looked like in Beta 1.7.3 and prior.

Gameplay

Adventure mode
  • Only playable using commands.
  • Building, setting things on fire and using buckets is disabled.
  • Players can only interact with mobs and the environment.
  • Players can place and take stuff from a chest, a furnace or a dispenser.
Trading
  • Using emerald as currency, villagers will, depending on profession, offer different trades to players.
  • There are three kinds of trades: Selling, buying and enchanting.
  • As displayed in the top-most part of the trading GUI, villagers take one or more items or item stacks and give back something.
  • After trading, villagers will sometimes emit purple particles for a few seconds to indicate that their trades changed.
  • Otherwise unobtainable bottles o' enchanting and chainmail armor can be obtained by trading.
Commands
  • /seed
    • Shows the map seed.
  • /defaultgamemode
    • Chooses the gamemode new players start in.
  • /debug
    • Enables and disable profiling.
  • /gamemode
    • Changes the player's gamemode.
  • /toggledownfall
    • Toggles rain and snow
  • /time
    • Changes the world time
  • /give
    • Gives an item to a player
  • /xp
    • Adds experience to a player
  • /kill
    • Kills a player
  • /help
    • Provides help for commands.

World Generation

Bonus chest
Desert villages
Desert temples
Jungle temples
  • Built out of various kinds of cobblestone.
  • Contain multiple tripwire traps triggering dispensers filled with arrows.
  • Loot chests include bones, rotten flesh, gold ingots, iron ingots, diamonds and emeralds.

Blocks & Items

Emerald Ore
Emerald
Block of Emerald
  • Crafted by putting 9 emeralds on a crafting table.
Ender Chest
  • Crafted by surrounding an eye of ender with 8 pieces of obsidian.
  • Stores each player's contents across dimensions and all Ender Chests.
  • Contents are preserved even if all Ender Chests are destroyed.
  • Explosion-resistant.
  • Emits light and purple particles.
  • Unless mined using a Silk Touch-enchanted pickaxe, they drop 8 obsidian.
Tripwire Hook
Wooden Slabs
  • Added all wood types.
  • Wooden slabs crafted after the update act like wood.
Sandstone Stairs
  • Crafted in the same pattern as other stairs using sandstone
Wooden Stairs
  • Added wooden stairs for all kinds of wood.
  • Adjusted hitbox.
Book and Quill
  • Right-click to write on & edit up to 50 pages or read.
  • Click 'Done' to save the book, 'Sign' to choose a title and finalize the book.
  • Crafting recipe: 1 ink sac, 1 feather and 1 book in any possible shape.
Written Book
  • Can only be obtained by signing a Book and Quill.
  • Can be sold to villagers.
Golden Apple
  • Has two crafting recipes now, the new one replacing gold nuggets with gold blocks.
  • Second tier gives Regeneration IV, Resistance and Fire resistance effects.
  • Only second tier glows like enchanted tools.
  • Has attributes the Golden Apple had before 1.1.

Changes

General

Launcher
  • Includes demo mode. Note: Clicking on demo mode without the game installed will not work, and instead freeze at game updating and not download.
  • The "Loading update news" message which appears when the launcher attempts to load the release feed is now styled, rather than the plain html it was prior.
Performance
  • Reduced CPU, RAM & bandwidth usage.
  • Accelerated chunk loading.
  • Decreased lag spike frequency.
  • Made the Nether less laggy.
  • Decreased unnecessary world updates.
  • Made the chat work smoothly even when the server is laggy.
  • Decreased packets sent between client and server.
Servers
  • Made singleplayer internally use a multiplayer server.
  • Decreased world saving intervals.
F3 debug screen
  • Truncated coordinates to 5 fractional digits.
  • The y-coordinate now shows both the feet level and the eye level.
  • Removed frame rendering time history graph (bottom-left).
  • 3 new values:
    • ws: Walking speed (constant)
    • fs: Flying speed (constant)
    • g: Boolean value, true when you touch the ground
Language files
  • Added tooltips for all types of Monster Egg blocks and the End Portal Frame.
  • Added more descriptive tooltips for different types of tree-related blocks, sandstone and stone bricks.
  • Localized server command responses.
  • Added missing commands-related strings.
  • Added missing double chest GUI caption.
Superflat world type
  • Respawning in superflat is no longer random.

Gameplay

Creative mode inventory
  • There are categorized tabs for various groups of items and blocks.
  • Added a search tab which will automatically be switched to when the chat key is hit.
  • Added survival inventory tab, which shows the full inventory, a 'Destroy item' slot, armor slots including a preview of your character and a 2x2 crafting field.
  • Items can now be deleted from the inventory by shift-clicking them.
  • Added layered snow block, Monster Egg Blocks (Silverfish spawning blocks), Ender Portal frame and all potions.
  • Now shows potion effects' timers like in Survival.
  • You now spawn with an empty inventory in Creative mode.
Experience collection
  • Depending on ore type, experience now drops from ores that drop items.
  • Taking smelted items out of furnaces gives experience now.
  • Destroying mob spawners gives experience now.
  • Adjusted experience level progression:
    • Levels 1-15 cost 17 XP points each
    • Levels 16-30 cost 3 more XP points than the previous (cost = 17 + (level - 15) * 3)
    • Levels 31-8 cost 7 more XP points than the previous (cost = 62 + (level - 30) * 7)
Enchanting
  • The new maximum level with bookshelves is 30, without 8.
  • 15 bookshelves are enough to reach level 30.
  • The 3rd slot shows the most expensive possible enchantment more often.
  • Increased chances for multiple enchantments at once.
  • Adjusted enchantments' to go with the new maximum level.
Commands
  • Made server commands more descriptive.
  • /ban
    • Added reason parameter
  • /kick
    • Can now contain "\n" to force a new line.
  • /tp
    • Can now be used to teleport to specific coordinates.
Multiplayer
  • Added option to let LAN friends join SP games
    • You can choose which gamemode players join in and whether they are allowed to use cheats.
  • Made entities less likely to glitch through blocks.
  • Added automagical downloading of standard sized texture packs when joining servers.
  • Blocks other players are mining now show cracks.
  • Made server list re-orderable: shift+click or shift+arrow keys move selected servers.
  • Server list now scans for LAN servers.
  • Added hardcore difficulty: Players are banned upon death.
  • Connections are now encrypted to prevent eavesdropping.
  • Added SRV Record Lookup support
    • Different subdomains of one domain can handle different servers via different port numbers.
    • Service name should be "minecraft"; i.e. "_minecraft._tcp.example.com".
Added & changed many minor things
  • Individual, stackable items near each other on the ground now become one item stack.
  • Added shift clicking support to armor slots, brewing stands & enchantment tables.
  • Made the stars smaller and brighter.
  • Removed the downwards knockback while drowning.
  • The "Mojang" splash screen when opening the game appears for 1 instead of 3 seconds now.
  • The sky color in the End changed.
  • Blocks now show cracks when destroying them while the GUI is hidden.
  • You can now fall 4 blocks without getting hurt (might be a bug as there exist other, higher distances that don't cause damage either).
Pick Block key
  • You now get the actual block.
  • You can now pick paintings, boats, minecarts and mobs, which will give you their spawn eggs.
  • Picking huge mushroom blocks now gives mushrooms.
  • You can no longer pick portal blocks.
  • When riding a minecart which is currently on a rail, using directional keys will allow the player to slowly move the minecart in that direction.

World Generation

Extreme Hills biomes
  • Now generate with emerald ore.
  • Occurs up to 8 times per chunk in veins of 1.
  • Generates between layers 4 and 31, inclusive.
Mountains
  • Made sub-biome type mountains like Desert Hills or Ice Mountains taller
Jungle trees
  • Made cocoa beans appear on some small jungle trees

Blocks & Items

String
  • Can now be placed as tripwire
Wood
  • Can now be placed in 3 different directions.
  • Placement works like similar to piston placement.
Furnaces
  • Can be fueled by wooden tools now.
  • Return an empty bucket when using lava buckets as fuel now.
Ice
  • Instead of melting in the nether, it now disappears.
  • Can be obtained using Silk Touch-enchanted gear now.
Glass Panes
  • Can be obtained using Silk Touch-enchanted gear now.
Nether Portal
  • Leaks into the Overworld now: Depending on difficulty, zombie pigmen rarely spawn in them.
Slabs & Stairs
  • Will now be placed upside-down when placed on the upper half of a block's side.
  • When placed upside down, rails, pressure plates, levers, doors, torches, redstone torches, repeaters, redstone dust and beds can be placed on them - Redstone dust behaves like on glowstone - It transmits power horizontally and upwards, but not downwards. Redstone torches don't power redstone placed on slabs/stairs above them.
Leaves
  • Water slowly drips through them when it's raining.
Cauldrons
  • Slowly fill up when it's raining.
Dispensers
  • Minecarts & boats will now be placed if there's rails/water in place.
  • Instead of dispensing buckets, dispensers will now suck in or place water or lava in front of them.
Gravel
  • Changed texture
Levers
  • Can be placed on the underside of blocks.
Wooden Pressure Plates
Pistons
  • Now take 2 redstone ticks (4 game ticks) seconds to expand.
TNT
  • Depending on difficulty, does different amounts of damage now:
    • Peaceful: no damage
    • Easy: ½ less damage
    • Normal: same damage as before
    • Hard: ⅓ more damage.
Cocoa Beans
  • Retextured item.
  • Can be planted & grown on jungle wood now.
  • Can be grown instantly using bone meal.
Cookies
  • Give a full hunger point now.
Nether Warts
  • Can now be grown in the Overworld and in the End.
Book
  • Changed crafting recipe: 3 pieces of paper and one piece of leather in any shape.
Empty buckets
  • Stack up to 16 now.
Signs
  • Stack up to 16 now.
  • Crafting now gives 3 signs instead of 1.
Monster Spawners
  • Added NBT tags to further customize spawned mobs.
  • Only changeable using map editors or mods.
Boats
  • Are not broken by lilypads anymore, instead they run straight through the lilypad now, breaking and sometimes dropping it.
  • When they crash they can sometimes drop themselves.
  • Are less glitchy and more responsive now.
  • Increased maximum speed.
  • When exiting, players will be moved from the boat.
  • When broken by a player, they drop a boat now.
Minecarts
  • When on rails, they can be accelerated a bit while sitting in them.
  • When exiting, players will be moved from the minecart.
Door

Mobs

All mobs
  • Mobs can now spawn on top of all upside down slabs and stairs
Pigs
  • Drop 1-3 porkchops instead of 0-2.
Slimes
  • Reduced spawn rate in superflat maps.
Silverfish
  • When suffering from poison potions, they will now spawn more silverfish from nearby silverfish blocks more often.
Creepers
  • Increased knockback effect.
  • Depending on difficulty, they do more damage now:
    • Easy: ~50% less damage
    • Normal: same damage as before
    • Hard: 33.3…% more damage.
Creepers & spiders
  • Become aggressive towards the last mob or player that hit them now
Skeletons, Creepers & zombies
  • Become neutral against players again a few seconds after being hit in Creative.
Endermen
  • Endermen now stop in front of the player. When the player swings his/her sword, it teleports behind the player.
Villagers

Trivia

  • At the time, 1.3.1 held the record for the longest wait between major releases, with a release 153 days after the release of 1.2.1.
  • This version also held the record for the longest time from its first snapshot to its final release, at 111 days.

Fixes

41 bugs fixed

  • Fixed texture packs in folders not showing their icon and description
  • Fixed Man-in-the-middle attack allowing hackers to log in as you when you visit their server
  • Fixed the Open texturepack folder button not working on OS X
  • Fixed liquids slowing down flying players.
  • Fixed blocks with the same id but different data/damage values stacking in Creative inventory.
  • Fixed boats & minecarts not being one-hit breakable in Creative.
  • Fixed raw fish, dyes, saddles, potions, milk buckets and tools depleting in Creative.
  • Fixed water destroying non-solid blocks when breaking them from above.
  • Fixed Silk touch giving you only one slab from double slabs.
  • Fixed redstone updates not propagating through unloaded chunks.
  • Fixed repeaters getting stuck when loading their chunk.
  • Fixed tools taking damage when breaking insta-breakable blocks.
  • Fixed a few misalignments in the item sprite sheet.
  • Fixed the arrow representing players on held maps being offset.
  • Fixed being able to duplicate sand, gravel and powered rail.
  • Fixed placing a piston in front of another powered, but not extended one resulting in a glitched piston with the head's texture on all sides.
  • Fixed TNT dropping as a resource on creative mode.
  • Fixed powering specifically glitched pistons crashing the game.
  • Fixed the End Portal Frame block not showing as a block in the inventory.
  • Fixed weather not working correctly in certain biomes.
  • Fixed Overworld portals above Y=127 not being recognized when leaving the Nether.
  • Fixed various hacked mob spawners crashing the game.
  • Fixed thrown splash potions not preserving their type when reloading the world.

Multiplayer only

  • Fixed arrows scooting up to the top of the block they were shot on.
  • Fixed Endermen not opening their jaws.
  • Fixed fully charged arrows not showing their particle effect.
  • Fixed many sounds not playing.[1][2][3][4]
  • Fixed magma cubes' and slimes' jumping animations not showing.
  • Fixed thunderstorms not darkening the sky.
  • Fixed weather not fading in or out.
  • Fixed enchanted armor and tools not glowing to other players.
  • Fixed explosions not pushing players back.
  • Fixed TNT not knocking back players.
  • Fixed pistons not pushing back players.
  • Fixed players on minecarts, boats or pigs and spider jockeys not being displayed in the correct location.
  • Fixed glitchy mob prediction.[5]
  • Fixed fishing lines not showing.[3][6]
  • Fixed sneaking players' nameplates not staying hidden when loading the chunks they are in.
  • Fixed Unbreaking-enchanted tools sometimes breaking and then re-appearing a few times.
  • Fixed potion effects losing their graphical effects when traveling between dimensions.
  • Fixed blocks disappearing when placing them under yourself and jumping.

References

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