Vein Size

The Vein Size setting does not, as the name suggests, stand for the amount of blocks (volume) a vein has, but rather the length of a vein. Because of this a vein size of 2 or lower results in no blocks being generated at all. If you want to know which vein size generates which amount of blocks on average, you can take a look at the graph below or use this google sheet , which contains the average amount of blocks for the vein size 1 - 100.