Wooden Stairs/Asset history/Oak Stairs

Yellow	The block was introduced in this version.
Green	The block's texture was changed in this version.
Blue	The block's model was changed in this version.
Purple	The block's texture and model were both changed in this version.
Orange	Another visual change was made to the block in this version which does not fit in any of the above categories.
Red	The block was either removed in this version, no longer exists, or did not yet exist.
Cases where the model did not change are represented by cells spanning multiple rows. Cases where the model did change, but the change is not visible via the default view angle, are given separate cells. Changes which are not externally visible are not given cells.

From version		Normal				Upside-down				Textures used		Further info
From version		North	East	South	West	North	East	South	West	Before	After	Further info
Minecraft Infdev	20100629					-	-	-	-	-		Introduction
Beta 1.7										-	-	The texture application/UV for many blocks was changed in this version.
1.0.0	Beta 1.9-pre5											Texture change only
1.2.1	12w08a									-	-	Added upside-down stairs
1.7.4	13w48a									-	-	Fixed the UV for many stairs.^[1]
1.14	18w43a											Texture Update
1.14	18w47a											Texture Update

From version		Lowered portion				Raised portion				Textures used		Further info
From version		North -west	North -east	South -east	South -west	North -west	North -east	South -east	South -west	Before	After	Further info
1.4.2	12w34a									-		Added corner stairs. Due to a UV-related bug, many of these had two distinct models depending on their actual facing direction. Some of these differences are not visible from the rendering direction.
1.7.4	13w48a									-	-	Fixed the UV for many stairs.^[1]
1.14	18w43a											Texture Update
1.14	18w50a											Texture Update

From version		Further info
Minecraft Infdev	20100629	Introduction
Alpha v1.0.1		Has a graphical bug:
Beta 1.6	Test Build 3	Fixed the graphical bug
Beta 1.7		UV changes
Beta 1.8	Pre-release
1.0.0	Beta 1.9-pre5	Texture changed - see blocks section
1.0.0	RC2
1.5.1	13w11a	Inconsistently appears as in some versions due to mipmapping
1.8	14w17a
1.9	15w31a
1.14	18w43a	Texture Update
1.14	18w47a	Texture Update
1.15	19w39a	Brightness on both sides is now equal
	19w40a	Brightness increased
	19w41a	Readded shadows
	19w42a	Shadows are now less harsh
	pre1	VERY subtle differences
	pre3	Darkened shadows again
	pre4	Slightly brightened

Beta 1.0: With the introduction of tooltips, the block has been officially named Wooden Stairs.

Yellow	The block was introduced in this version.
Green	The block's texture was changed in this version.
Blue	The block's model was changed in this version.
Purple	The block's texture and model were both changed in this version.
Orange	Another visual change was made to the block in this version which does not fit in any of the above categories.
Red	The block was either removed in this version, no longer exists, or did not yet exist.
Cases where the model did not change are represented by cells spanning multiple rows. Cases where the model did change, but the change is not visible via the default view angle, are given separate cells. Changes which are not externally visible are not given cells.

From version		Normal				Upside-down				Textures used		Further info
From version		North	East	South	West	North	East	South	West	Before	After	Further info
v0.1.0 alpha						-	-	-	-	-		Introduction
v0.2.0 alpha												Texture changed, and UV was allegedly changed.
v0.4.0 alpha										-	-	This can only have been a UV change.
v0.6.0 alpha										-	-	Introduced upside down stairs.
?										-	-	A model change.
v1.10.0	beta 1.10.0.3											Texture Update

Section pending.

Section pending.

From version		Item	Further info
v0.1.0 alpha			Introduction, from `gui_blocks.png`
v0.2.0 alpha			From `gui_blocks.png`
v0.3.2 alpha			From `gui_blocks.png`
?			From `gui_blocks.png`
?			From `gui_blocks.png`

Sources