I have not been able to find this(mtl_terraintex) in the code/include folders or in mtlFX.c...I also cannot find, but one reference to it in the manual. I basically want to use it, can someone point me in the right direction?

"mtl_terraintex" is a pointer. You won't find pointers in a folder of your harddisk... it's defined in mtlFX.c.

Yes, I understand it is a material pointer, but I cannot find it in mtlFX.c....that is what I meant.

Maybe you have an old version?

I'm not sure why possibly it is the directory E:\Program Files\GStudio7\code,,,is empty, but I re installed(several times now) and it finally took..my computer is moody sometimes....I don't know why. I did manage to get it....
New question.

How do I tile the skins, but clamp the the masks for this shader? the code does not look like it is set up for tile-ing the skins.