A modular free terrain shading system focused on performance and ease of use.

Have a look at MicroSplat for Unity, a modular free terrain shading system focused on performance and ease of use. MicroSplat is described as a replacement shader system for Unity Terrains.

“Simply add the MicroSplatTerrain component to your terrains and with a single button press, your terrain shading is significantly improved.”

MicroSplat’s Core shader package features:

• Up to 32 textures on one terrain in a single pass
• Significantly faster than any other shader on the asset store
• PBR rendering, with automatic generation of normal, height map, smoothness, and ambient occlusion data when textures are not provided
• Support for 2018.3 Terrain Instancing
• Height based blending
• Multiple lighting modes
• Terrain or World Space UVs
• Substance Support w/ substance plugin
• Support for Emissive and Metallic surfaces
• Utilities to import/export splat maps from external programs – Vegetation Studio integration which adds support for grass map rendering.
• Vegetation Studio integration which adds support for distance shadow rendering, rendering dynamic shadows over the entire terrain.

Per Texture controls are available for:

• UV Scale and Offset
• Albedo Tint, Contrast, and Brightness
• Metallic value
• Smoothness Strength
• Normal Strength
• AO Strength

You can learn more and get the pack here.