Different between shader in blender and godot4

Godot Version

godot 4.4 dev7

Question

i export the *.fbx from cc4 to blender, and in he blender the sharder is as follow:(To make the issue more noticeable, I will set this to 10.)

when i export the *.glb from blender, and import it to the godot. the result is normal, i mean same with blender.

actuall i cost many time to learn how to set the standardmaterial3d in godot to follow the blender, finnaly by this mehod, i understand i should configure the parameters as above.
But this material is embedded in the mesh.

i want to get the same result by the “surface material override”, so i do it like this:

the issue is coming, Why are there so many marks on the skin?