Hello all,

I am currently trying to make a tile based engine, each type of tile having it's own texture, I wondered how it is possible, when two different type of tiles meet, to make a progressive blend in between the two, using some sort of interpolation.
I have already played(without much success) with the ARB extention, I managed to mix 2 textures. But it's not really what I seek.

I have heard about 3 things which maybe could help me,splatting alpha maps and multipass rendering, I have searched in vain.
So, if anybody could enlighten me, or just point out some simple tutorial, I would really apreciate.

Thanks for your time.

PS:Without going that far, my idea was to be able to do something that at least looks a bit like this: