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Add 2 kinds of rounded pillar shaped and extensible blocks that perfectly fit to vanilla textures (or your texture pack) using mainly rock and wood blocks (and some fancy in bonus).
As a precision, this mod was mainly done for the 1.12.2 version, containing lots of variants in the extensions (see below), and newer versions mainly support the vanilla blocks.
The thin pillar recipe is a vertical line of 3 blocks, in the middle of the crafting box.
The middle ingredient is a clay ball (it's a shaped recipe !)
NB : before 3.2.0, the recipe was 3 similar blocks, in the middle of the crafting box
The full pillar recipe is a shapeless recipe of 2 thin pillars (and is reversible)