Height Mapping

[Under Construction]

Height Mapping is a technique to blend textures based on a height map. This is useful for materials like a uneven stony road on a grass terrain, as the materials gradually blend, the grass is first filling the spaces between the stones before the stones completely vanish.

For this to work you need a height map of the texture like here:

Diffuse, normal, specular and height map. (For the creation of this texture image see Creating_Seamless_Procedural_Textures_with_Blender#Bricks_as_a_"Quad_Texture")

Height mapping is also explained/shown here:

• http://forum.unity3d.com/threads/heightmap-based-blend-shader-for-terrains-to-render-e-g-cobblestones.151209/
• http://acegikmo.com/shaderforge/wiki/index.php?title=Advanced_Texture_Splatting