vertical “slabs” using powered pistons and tick stepping

pros: vertical "slabs" (technically still a full block)

cons: frozen time, need space for pistons, must all be placed at once

tutorial:

1. stop time with "/tick freeze"

2. place blocks with (sticky) pistons where you want vertical slabs

3. power pistons (i use redstone blocks)

4. run "/tick step 2t"

it works best if you use a separate world for each build, as unfreezing time/tick stepping further pushes the blocks too far, ruining the illusion.