{{Infobox guide
|edition = Java
|vers=
* {{vl|je 1.3.1|}}
* {{vl|je 1.3.2|}}
|next = Pretty Scary Update
|prev = 1.2 releases
}}
This guide is a simplified overview of all the changes in the {{JE}} 1.3.x releases, which assumes at least some familiarity with the Java Edition 1.2.x releases.

== Mobs ==
=== Changed ===
{|{{Simple Guide table|Changed Mobs}}
|-
|All mobs
|
|Mobs can now spawn on top of all upside down slabs and stairs.
|-
|[[Pig]]s
|[[File:Pig JE2 BE1.png|128px]]
|Drop 1–3 porkchops instead of 0–2.
|-
|[[Silverfish]] 
|[[File:Silverfish.gif|128px]]
|Now spawn more silverfish from nearby [[infested block]]s more often, when suffering from Poison potions.
|-
|[[Creeper]]s
|[[File:Creeper JE3 BE1.png|128px]]
|
* Now have increased knockback effect.
* Now do more or less damage depending on difficulty:
** Easy: ~50% less damage.
** Normal: same damage as before.
** Hard: 33 1⁄3% more damage.
|-
|[[Endermen]] 
|[[File:Enderman JE2.png|128px]]
|
* Now stop in front of the player. 
* Now teleports behind the player when the player swings their sword.
|-
|[[Villager]]s
|{{Animate|Farmer.png; Librarian.png; Priest.png; Blacksmith.png; Butcher.png|128px}}
|Now get a random profession when spawned from spawn eggs.
|} 

== Blocks ==
=== New ===
{|{{Simple Guide table|New Blocks}} 
|-
|[[Emerald ore]]
|[[File:Emerald Ore JE2 BE1.png|84px]]
|Generates in [[extreme hills]].
|Pickaxe (iron or better) 
|Drops [[emerald]]s, which can be used for villager trading or crafted into a [[block of emerald]].
|-
|[[Block of emerald]] 
|[[File:Block of Emerald JE1 BE1.png|84px]]
|
{{Crafting
|A1=Emerald
|A2=Emerald
|A3=Emerald
|B1=Emerald
|B2=Emerald
|B3=Emerald
|C1=Emerald
|C2=Emerald
|C3=Emerald
|Output = Block of Emerald}} 
|Pickaxe (iron or better)
|Can be used as a decorative block.
|-
|[[Ender chest]]
|[[File:Ender Chest JE1 BE1.png|84px]]
|
{{Crafting
|A1= Obsidian
|B1= Obsidian
|C1= Obsidian
|A2= Obsidian
|B2= Eye of Ender
|C2= Obsidian
|A3= Obsidian
|B3= Obsidian
|C3= Obsidian
|Output= Ender Chest
|type= Decoration block
}}
|
* Pickaxe
** Drops itself when mined with a tool enchanted with [[Silk Touch]], otherwise drops eight [[obsidian]].
|Can store items per player, and which contents can be accessed from anywhere in all dimensions.
|-
|[[Tripwire hook]]
|[[File:Tripwire Hook JE1.png|84px]]
|
{{Crafting
|B1= Iron Ingot
|B2= Stick
|B3= Any Planks
|Output = Tripwire Hook,2
|Type=Redstone
}} 
|Any
|Can be used with [[tripwires]] to activate [[redstone]].
|-
|[[Tripwire]]
|[[File: Tripwire.png|84px]]
|Obtained from killing [[spider]]s and breaking [[cobweb]]s, and generates naturally in [[jungle temple]]s.
|Any
|
* The block form of [[string]].
* Used to activate tripwire hooks.
|-
|[[Cocoa pod]]
|{{Animate|Cocoa Age 0 (S) JE1.png; Cocoa Age 1 (S) JE1.png; Cocoa Age 2 (S) JE1.png|84px}}
|Generates naturally on [[jungle tree]]s, and created by placing [[cocoa beans]] on [[jungle log]]s.
|Any
|
* The block form of [[cocoa beans]].
* When fully grown, drops additional cocoa beans when broken.
|-
|[[Sandstone stairs]] 
|[[File:Sandstone Stairs (N) JE2 BE1.png|84px]]
|
{{Crafting
|A1 = Sandstone
|A2 = Sandstone
|A3 = Sandstone
|B2 = Sandstone
|B3 = Sandstone
|C3 = Sandstone
|Output = Sandstone Stairs,4
}} 
|Pickaxe
|Can be used as a decorative block.
|-
|Spruce, birch and jungle [[stairs]] and [[slab]]s
|{{Animate|Spruce Stairs (N) JE2 BE1.png;Birch Stairs (N) JE2 BE1.png;Jungle Stairs (N) JE2 BE1.png|84px}}
{{Animate|Spruce Slab JE1 BE1.png;Birch Slab JE1 BE1.png;Jungle Slab JE1 BE1.png|84px}}
|
{{Crafting
|A1 = Spruce Planks;Birch Planks;Jungle Planks
|A2 = Spruce Planks;Birch Planks;Jungle Planks
|A3 = Spruce Planks;Birch Planks;Jungle Planks
|B2 = Spruce Planks;Birch Planks;Jungle Planks
|B3 = Spruce Planks;Birch Planks;Jungle Planks
|C3 = Spruce Planks;Birch Planks;Jungle Planks
|Output = Spruce Stairs,4;Birch Stairs,4;Jungle Stairs,4
}}
{{Crafting
|A2 = Spruce Planks;Birch Planks;Jungle Planks
|B2 = Spruce Planks;Birch Planks;Jungle Planks
|C2 = Spruce Planks;Birch Planks;Jungle Planks
|Output = Spruce Slab,2;Birch Slab,2;Jungle Slab,2
}} 
|Axe
|Decorative building blocks.
|-
|[[Wood]] 
|{{Animate|Oak Wood Axis Y JE1 BE1.png; Spruce Wood Axis Y JE1 BE1.png; Birch Wood Axis Y JE1 BE1.png; Jungle Wood Axis Y JE1 BE1.png|84px}}
|Only obtainable by third party programs.
|Axe
|Can be used as a decorative block.
|}

=== Changed ===
{|{{Simple Guide table|Changed Blocks}}
|- 
|[[Wooden slab]]s and [[wooden stairs]]
|[[File:Oak Slab JE1 BE1.png|84px]]
[[File:Oak Stairs JE5 BE5.png|84px]]
|
* Added all wood types.
** Wooden slabs crafted after the update act like wood.
** Adjusted hitbox.
|-
|[[Wooden pressure plate]]
|[[File:Oak Pressure Plate JE3 BE1.png|84px]]
|Can be triggered by arrows.
|-
|[[Log]]
|[[File:Oak Log Axis Y JE2 BE1.png|84px]]
|
* Can now be placed in 3 different directions.
** Placement works similar to piston placement.
|-
|[[Furnace]]
|[[File:Furnace JE2 BE1.png|84px]]
|
* Can now be fueled by wooden tools.
* Now return an empty bucket when using lava buckets as fuel.
|-
|[[Ice]] 
|[[File:Ice JE1 BE1.png|84px]]
|
* Now disappears instead of melting when placed in the Nether, regardless of light.{{verify|wording implied that}}
* Can now be obtained using Silk Touch-enchanted tools.
|-
|[[Glass pane]]s
|[[File:Glass Pane JE1 BE1.png|84px]]
|Can now be obtained using Silk Touch-enchanted tools.
|-
|[[Dispenser]] 
|[[File:Dispenser JE2 BE1.png|84px]]
|
* [[Minecart]]s & [[boat]]s are now placed if there's rails/water in place respectively.
* Now suck in or place water or lava in front of them instead of dispensing buckets.
|-
|[[Gravel]]
|[[File:Gravel JE4 BE2.png|84px]]
|Changed texture.
|-
|[[Lever]]s
|[[File:Wall Lever (S) JE2-L1.png|84px]]
|Can be placed on the underside of blocks.
|-
|[[Piston]]s
|[[File:Piston JE1 BE1.png|84px]]
|Now take 2 redstone ticks (4 game ticks) to extend.
|-
|[[TNT]] 
|[[File:TNT JE2 BE1.png|84px]]
|
* Now does different amounts of damage depending on difficulty:
** Peaceful: no damage.
** Easy: ½ less damage.
** Normal: same damage as before.
** Hard: ⅓ more damage.
|-
|[[Nether wart]] 
|{{animate|Nether Wart Age 0 JE1.png;Nether Wart Age 1-2 JE1.png;Nether Wart Age 3 JE1.png|84px}}
|Can now be grown in the Overworld and in the End.
|-
|[[Sign]]s
|[[File:Oak Sign JE1 BE1.png|84px]]
|
* Now stack up to 16.
* Crafting now gives 3 signs instead of 1.
|-
|[[Monster spawner]]s
|[[File:Spawner JE2.png|84px]]
|
* Added NBT data to further customize spawned mobs.
** Only changeable using map editors or mods.
|-
|[[Door]]s
|[[File:Oak Door JE3 BE1.png|84px]]
|Now show their damage when being broken by zombies.
|-
|All [[slab]]s & [[stairs]] 
|
|
* Are now placed upside-down when placed against 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.
|}

== Items ==
=== New ===
{|{{Simple Guide table|New Items}}
|-
|[[Emerald]] 
|[[File:Emerald JE1 BE1.png|84px]]
|Can be obtained by mining [[emerald ore]].
|Used to trade with villagers.
|-
|[[Book and quill]] 
|[[File:Book and Quill JE1 BE1.png|84px]]
|
{{Crafting
|Book
|Ink Sac
|Feather
|Output= Book and Quill
|type= Miscellaneous
}}
|
* Right-click to read or write in and edit up to 50 pages.
* Clicking 'Done' saves the text edited into the book.
* Clicking 'Sign' chooses a title to finalize the book.
|}

=== Changed ===
{|{{Simple Guide table|Changed Items}}
|-
|[[Tool]]s
|
|Breaking a block that can be [[instant mining|instantly mined]] by hand while holding a block-breaking tool no longer reduces the tool's [[durability]].
|-
|[[String]]
|[[File:String JE1 BE1.png|84px]]
|Can now be placed as tripwire.
|-
|[[Cocoa beans]]
|[[File:Cocoa Beans JE3 BE2.png|84px]]
|
* Changed texture.
* Can be planted & grown on jungle wood now.
* Can be grown instantly using [[bone meal]].
|-
|[[Cookie]]
|[[File:Cookie JE1 BE1.png|84px]]
|Gives a full hunger point now.
|-
|[[Book]]
|[[File:Book JE1 BE1.png|84px]]
|Changed crafting recipe: 3 pieces of paper and one piece of leather in any shape.
|-
|[[Bucket]]
|[[File:Bucket JE1 BE1.png|84px]]
|Stacks up to 16 now.
|}

== Structures ==
=== New ===
{|{{Simple Guide table|New Structures}}
|-
|[[Desert village]]
|[[File:SandstoneHouse.png|256px]]
|Deserts
|Can generate blacksmith buildings with 1 chest.
|Villagers
|Desert village variant made from sandstone instead of cobblestone and wood.
|-
|[[Desert pyramid]]
|[[File:Desert pyramid JE1 BE1.png|256px]]
|Deserts
|4 chests
|None
|
* Built out of various kinds of sandstone and wool.
* Includes hidden chest room and TNT trap, with loot including rotten flesh, bones, iron ingots and gold ingots, diamonds and emeralds.
|-
|[[Jungle pyramid]]
|[[File:Jungle pyramid JE1 BE1.png|256px]]
|Jungles
|2 chests
|None
|
* Built out of various kinds of cobblestone.
* Contains multiple tripwire traps triggering dispensers filled with arrows.
* Loot chests include bones, rotten flesh, gold ingots, iron ingots, diamonds and emeralds.
|}

== World types ==
=== New ===
{|{{Simple Guide table|New World types}}
|-
|[[Large biomes]] 
|[[File:Large Biomes Button.png|248px]]
|
* Generate as default worlds, but biomes are 16× bigger.
* Beaches look similar to their appearance in [[Java Edition Beta 1.7.3]] and prior.
|Same as in a default world.
|}

== See also ==
{{Navbox guides}}

[[es:Guías de Java Edition/Lanzamientos 1.3]]
[[ja:ガイド/Java Edition/1.3 リリース]]
[[pt:Guias da Edição Java/Versões estáveis da 1.3]]
[[ru:Обзоры версий Java Edition/Полные выпуски 1.3]]
[[uk:Керівництва з Java Edition/Релізи 1.3]]
[[zh:Java版指南/1.3版本]]