Features
Blocks
This mod adds bark blocks, a new type of wooden block. When you strip a log with silk touch, you now get a bark block of the corresponding wood type. Bark blocks are hollow through one axis, leaving only a two-pixel-thick ring. As they are hollow, you can stand or crawl inside them and they can also be waterlogged.
worldgen
In 1.21.5, Mojang added fallen trees to java edition: This mod adds a 1/5 chance to replace fallen trees with a hollow variant - made from bark blocks.
