Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Colormap Ultra Terrain Shader Free.
Colormap ULTRA Terrain Shader v3.0.9
The Colormap Ultra Terrain Shader has been written with visual fidelity, ease of use and performance in mind.
Features
• Unity 2018.3+ support
• Instancing support for the Parallax and Tessellation shader
• Up to 8 PBS detail textures sets within a single pass
• Height based blending
• Color Map support to add much more variety to the terrain texturing
• Multi UV Mixing and Perlin Noise to reduce tiling artifacts
• Dynamic Weather to add procedural snow, water and wetness
• Painted Terrain Holes, Snow and Wetness Masks, Puddles and Streams
• Enhanced Parallax Mapping or Tessellation
Requirements
The shaders need DX11 or OpenGLCore – WebGL is not supported.