Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Retro Terrain Free.
Retro Terrain v1.0
Retro Terrain is a terrain engine which generates beautiful block-style voxel terrain quickly and efficiently with little effort. (Note: not suitable for large worlds. Anything above 512x64x512 could cause the game to function incorrectly)
– Random terrain generated at runtime
– Dynamic free-flowing water
– Multiple water heights
– Random, natural occurring waterfalls
– Texture manager (Combines given block textures into a single terrain atlas)
– Block manager (Apply textures to different sides of block)
– Chunk view distance system (Loads chunks in and out at runtime depending on the player position)
– Simple block selection and placement system
– Underwater effects
Includes an example scene and 13 free textures.