There are natural blocks, like rocks, gravel, sand, dirt, and also refined blocks that are perfectly square. At the moment you can only alter the natural blocks. I THINK. I’ve not messed with it too much but Luca was explaining it a bit more.
I grabbed his post for ya!
There’s no final controls for these yet at all, but you can get them (carefully) by placing a slope-type block like sand in one of the first set of quick-use slots, and hold CTRL as you place it.
But be careful, CTRL+W is a common browser shortcut to close a tab 🙂
from 1-6 it goes full block, diagonal block, small corner block, large corner block, saddle shape, pyramid style corner block