Hi again:)
Im not sure I follow. In the set up above I have a convoluted (because I cant see any other way) connection to the Layer blend that is taking care of the World Disp. Every other constellation i tried failed, as does this one. No error. It just breaks the Mat.
I also tried instroducing a Matt Att after the Height lerps ( as in ths hot above, only witjh a Matt Att after, and I also tried before, it reaches the Layer blend, and got an eror “Cannot mix Matt Att with non Matt Att nodes”. Ive uploaded the material and the function if you get a chance to look at it as I confess at this stage I am profoundly confused:(