Create a 256×256 survival island in...

Create a 256×256 survival island in Minecraft . Make it natural, irregular, and highly detailed — hills, cliffs, caves, rivers, waterfalls, and multi-level terrain. Include mixed forests (oak, birch, spruce, jungle), flowers, bushes, vines, and animals (cows, pigs, chickens, sheep, fish). Provide survival resources: exposed ores, hidden chests, farming areas, fishing spots, and starter shelter. Include a path to a Nether portal and hidden End portal. Add secret caves, overhangs, landmarks, and multi-level exploration. Avoid flat or geometric shapes. Output should be ready for survival, immersive, and fully playable from day one to the End.