after correcting the shade-c 0.91 terrain shader, I transformed it into a 8 texture blending version, but resulted in less than 20 fps, so I made a new one, blending only 4 textures with normal and specular maps + base texture with normal and specular map + lightmap, but the performance is still not good enough at all... maybe removing some things will help. or Heelx will make a better one, if I send him finally some graphics stuff what I always forget
Edit: removing tiled normalmaps and specularmaps helped to improve performance. but shadow blurring is still very ugly