Hi Sivan,
Blending on the alpha is a smart idea. Is their a shader code of such on the forums (a simple one would suffice)? I already have the terrain and detailmaps ready and want to use paint shop pro for precise tile placement.
ps: are you making a game too? You can make something pretty with a terrain like that
, just saying.
-edit, going to try the standard mtl_terraintex and see if that works out.