
I would really appreciate if someone can explain how to do it.
cheers

Pagefan
*warning: very crude explanation*
I suppose it works like in maya, that is scaling your s,t parameters of your surface. In VOPS (think that is slim in maya or the hypershader) there might be a tile vop. When you write your own shaders you prolly want to do something like:
float ss = s / scale;
float tt = t /scale;
Then use ss,tt to scale down your image.