A note about terrains

Ainur Engine uses Editable Terrain Manager which supports also terrain editing, which is a feature useful for the future Ainur Editor.
ETM is capable of splatting up to 12 textures per pass, using 4 coverage maps with 3 channels RGB, which seems to be the maximum number of textures per pass allowed by shader model 2.0 - actually Ainur is using 9 textures with 3 coverage maps but I am already removing shader model 1.0 support where it does make sense.
Since actually OpenGL 3.0 is not well received and Ogre only (officially) supports OpenGL and Direct3D, shader model 2.0 makes sense. Every graphics card should support it.