The node reference is good, but I guess where I fall short is how linking different shaders/nodes together to get desired results. For example, I still have not found an answer to what does the "Use Shader" field on the Heightfield generator do. Any shader I put there kills the heightfield. Another forum member directed me to move the shader to after the heightfields before the compute terrain - which does work, but then it effects all the terrains if you happen to have more than one. So still in the dark what that field is even for....
Same with some other shaders, the node network allows you to hook shaders together but you don't seem to get any results most of the time. For example, I tried to use the multi-shader, to allow input from an image map shader and a crater shader and ended up with nothing on my terrain...
Thanks,
JR