// create material
Material newMaterial = new Material( Shader.Find("Diffuse"));
// assign shader
newMaterial.shader = sourceMaterial.shader;
// copy properties from existing material
newMaterial.CopyPropertiesFromMaterial(sourceMaterial);
// create texture from asset(asset path)
Texture texture = (Texture)AssetDatabase.LoadAssetAtPath( textureRelativePath, typeof(Texture));
// assign texture to material
newMaterial.SetTexture("_MainTex", texture);
// create material asset
AssetDatabase.CreateAsset(newMaterial, newMaterialAssetRelativePath);
// assign material to gameObject
AssignMaterial( gameObject, newMaterial );
在建立texture時需注意，在editor部份可以使用AssetDatabase.LoadAssetAtPath，而runtime則需使用Resource.Load。
