Playing on the old version 0.6.0, I was somehow able to get strange half-blocks. In the inventory, they look like wooden half-blocks, but on a red background, and on the hotbar they look like a red square. In the game itself, they have the texture of a wooden half-block, but the functionality of a stone half-block. The block itself has the name "stone slab", despite the wooden texture. No matter how I set it, it is always set with an offset of half a block up. Combining these semi-blocks did not give anything.
Playing on the old version 0.6.0, I was somehow able to get strange half-blocks. In the inventory, they look like wooden half-blocks, but on a red background, and on the hotbar they look like a red square. In the game itself, they have the texture of a wooden half-block, but the functionality of a stone half-block. The block itself has the name "stone slab", despite the wooden texture. No matter how I set it, it is always set with an offset of half a block up. Combining these semi-blocks did not give anything.
https://ibb.co/DCdBgw0
https://ibb.co/d2C7WdM
https://ibb.co/g9nbHvg
https://ibb.co/VMwz1QR
https://ibb.co/PFs3yx7
https://ibb.co/3BVS9Lg
My guess is it's some bigger version of the JE Petrified Oak Slab, but idk.
Also, why do you say half-block and not slab?