Java Edition:Block Above Build Limit
To do: Add when this was recontinued, change title to invalid blocks at certain height probably, From Beta 1.5 to Beta 1.6 Test Build 3 game didn't allow for placing solid blocks on layer 127, making full blocks placed on layer 127 before Beta 1.5 discontinued.
Obtaining
Farlands Generation
The farlands generate 128 blocks high until the world stops generating.
Glass Pillar
Glass Pillars generate above every stronghold in Beta 1.9 Pre-release 3, one will always generate at 0,0 making them easy to find.
Glass pillars are 1x1 columns made entirely of glass. Two of them generated above each stronghold. They stretched from the one block above build height limit to the upper corner of the stronghold room. One of them always led to the portal room and the other always led to a spiral staircase. The reason for adding them was locating strongholds. They have been removed with the introduction of eye of ender stronghold locating ability.
Layer 127 Placement
Gallery
A pair of glass pillars seen from ground level
Glass pillar leading to portal room
Glass pillar leading to spiral staircase
