From Minecraft Parkour Wiki
This article lists all parkour-related changes in newer versions of Minecraft (1.9+), including bugs and bugfixes.
For the full changelogs, see this article (Minecraft Wiki).
Changes are grouped into 3 categories:
Movement : Changes or additions to movement mechanics.Blocks : New blocks, or changes in current blocks' properties.Other : Changes that should be mentioned, but that do not affect standard parkour.
1.9 (Combat Update)
Category
Changes
Movement
Jump height increased (from 1.249 to 1.252). Momentum threshold has been lowered (from 0.005 to 0.003).
This is the reason why jump height is different, as well as taps . Sneaking now lowers the player's bounding box (from 1.8m to 1.65m).
Blocks
End rods added (0.25×1×0.25 bounding box, can be placed in all directions).
Chorus plants added:
Default: centered 0.625×0.625×0.625 bounding box (generally the same height as an end portal frame).
Connects to adjacent chorus plants and flowers. Also connects to any ground below it.
Chorus flowers have a simple 1×1×1 bounding box.
Shulkers added (technically entities) - 1×1×1 bounding box, but can rise by 0.20609b.
Grasspath added: 1×0.9375×1 bounding box
Ladders are now 1 pixel wider (from 0.125b to 0.1875b)
The bounding box of pane blocks have changed:
The neutral variant is no longer a cross, now it's just a 2 by 2 pixels pole.
The internal segments are 1 pixel longer.
Lilypads are now 0.09375b tall (1.5 pixels) and 0.875b wide (reduced by 1 pixel on all sides)
Boats (technically entities) are now 0.5625b tall (instead of 0.6b).
Bugfix: Piston heads now match their model:
The arms now have the correct width (0.25b).
The arm's length is extended by 0.25b, making piston heads the only block that can protrude horizontally onto adjacent blocks.
The west-facing extension is no longer bugged.
Bugfix: Chests and Anvils now have a fixed bounding box.
Other
Elytras added.
Levitation effect added.
Entities now push the player when colliding.
Falling on a hay bale absorbs most of the fall damage.
1.10 (Frostburn Update)
Category
Changes
Movement
Added "Auto-jump" option in the Controls tab. When toggled on, it automatically makes the player jump.
Auto-jump does not activate while sneaking.
Auto-jump activates
Notable uses include: 100% strat for hh 1+1 jumps, easy way for grinding on stairs aka "slab-boosting".
Blocks
Added Magma block, which damages the player when they are standing on it, unless they are sneaking.
1.10.1: Farmland is now 0.9375b tall (15px), instead of 1b.
Other
New Debug shortcut: F3+G shows chunk borders.
1.11 (Exploration Update)
Category
Changes
Movement
Sneaking now prevents falling more than 0.6b (previously 1b)
Blocks
Shulker Box added - 1×1×1 bounding box, can extend by 0.5b when opened with right click.
The extension increases and decreases by increments of 0.05b every tick.
The shulker box can only be opened if it doesn't end up intersecting with another bounding box.
Interestingly, the opening starts with a surplus of 0.01b, which means the player is actually pushed 0.51b.
Other
1.12 (World of Color Update)
Category
Changes
Movement
Blocks
Beds now have bouncing properties:
Only converts 66% of the player's downward speed, unlike slime blocks which are 100%.
Fall damage is reduced, but not completely negated unlike slime blocks.
Walls, Fences, and Panes/Bars now connect to the backside of stair blocks.
Other
1.13 (Update Aquatic)
Category
Changes
Movement
Water physics were changed quite a lot:
When simply walking, the player doesn't drop down as fast.
Sneaking makes the player dive downward.
Sprinting in water now puts the player in a swimming state, which makes them swim faster, and sets their height at 0.6.
The speed and "area of effect" of flowing water now depends on its level. The player can jump out of water if it's low enough.
Blocks
Blue Ice added, with a slipperiness of 0.989 (compared to 0.98 for regular Ice).
Added bubble columns:
Soulsand sets all consecutive water source blocks above it to upward bubble columns, which push the player up.
A Magma block sets all consecutive water source blocks above it to whirlpool bubble columns, which drag the player down.
Added Conduits, which have a centered 0.375×0.375×0.375 bounding box.
Added Sea Pickles, which have 4 variants (depending on the number placed):
Tier 1: 0.25×0.375×25
Tier 2: 0.625×0.375×625
Tier 3: 0.75×0.375×0.75
Tier 4: 0.75×0.4375×0.75
Added Turtle Eggs, which have 4 variants (depending on the number placed):
Tier 1 has an uncentered bounding box of 0.5625×0.4375×0.5625
Tiers 2,3, and 4 have a centered bounding box of 0.875×0.4375×0.875
Some blocks can now be waterlogged .
Anvils have a new model and bounding box:
The base is 0.75×0.75, and its floor is 0.25b high.
The top is 1×0.625, and its ceiling is 0.375b low. Wall blocks have a more accurate bounding box.
The sides now match those of their visual model.
The height remains at 1.5b.
filled End Portal Frames have a more accurate bounding box.
The eye now has a width of 0.5×0.5 (instead of 0.375×0.375)
Cauldrons have a more accurate bounding box.
The inner floor is now 0.25b high (instead of 0.3125)
Hoppers have a more accurate bounding box.
The inner floor is now 0.6875b high (instead of 0.625)
The underside of the hopper is now accurately represented;
Brewing Stand have a more accurate bounding box.
The base is now 0.875×0.875 (instead of 1×1)
Bug: exiting water at Y=256 sets the player in a state where they can jump higher.
Other
Tridents added.
Slow Falling effect added - makes the player fall a lot slower.
Dolphin's grace effect added - increases the player's swimming speed.
Debug stick added - used for modifying a block's state.
New Debug shortcut: F3+C copies the player's current coordinates.
The Debug screen now shows info about the targeted fluid, on top of the targeted block.
1.14 (Village & Pillage)
Category
Changes
Movement
X/Z collisions changed, the first direction processed now depends on the player's velocity.
Ladders and vines can now be climbed by pressing jump.Sneaking lowers the player's bounding box even more: (from 1.65m to 1.5m)
You can now fit under 1.5b ceilings
Forcing the player under ceilings lower than 1.5b activates the swimming state.
This can be done by using a piston or trapdoor.
Bugfix?: Blips have been patched: the player can no longer abuse stepping mechanics to gain jump height.
You can still clip onto the side of blocks when falling down.
A new glitch was introduced: "blip-down ", which happens when activating stepping on the edge of a block.
Bug: you can conserve X speed when moving into a corner.
Blocks
Movement on soulsand has been slightly tweaked.
...
Other
1.15 (Buzzy Bees)
Category
Changes
Movement
Slipperiness changed: only blocks below 0.5b of height are affected by slippery blocks.
Soulsand is no longer affected by ice and slime slipperiness.
Blocks
Other
1.16 (Nether Update)
Category
Changes
Movement
Blocks
Other
1.17 (Caves & Cliffs) - Upcoming
Category
Changes
Movement
Blocks
Other