Endless Overgrowth

The world is going green, and it isn't stopping.

Grass, moss, mycelium and nylium no longer wait politely for dirt. They creep over stone, sand and gravel, crawl down cliffs, line cave walls, carpet the sea floor and eventually start swallowing your buildings. It begins as a few patches. Every block it takes over starts spreading too, so the green edge keeps getting longer and the takeover keeps getting faster.

What spreads, and what it becomes

Features

• It covers every surface. Growth crawls over any exposed ground it can take, anywhere it touches air or water: hills, mountains, cliff faces, cave walls and ceilings, river beds and the ocean floor.
• It speeds up as it goes. The takeover starts slowly, then accelerates as the growing edge gets longer.
• It grows plants. Freshly overgrown ground sometimes sprouts short grass, ferns, flowers, moss carpet, azaleas, mushrooms, crimson and warped roots, fungi and nether sprouts. Glow berry vines, pale hanging moss and weeping vines dangle from overgrown ceilings.
• It grows on old ruins. Cobblestone and stone-brick walls turn mossy, and the moss travels along the whole wall. When building-eating is on, the moss then swallows planks, bricks, polished stone and other building blocks.
• It reaches every dimension. Nylium spreads through the Nether, and grass or moss carried into the End starts covering end stone.
• It's gentle on performance. It never loads new chunks. It only grows where the world is already loaded around players, and a per-tick cap keeps the server running smoothly.
• It leaves some things alone. Ores, logs, leaves, farmland, crops, glass, wool, concrete and anything else outside the growth lists are never touched.