Rhino 7 material broken?

Hi I got this surface applied with a greenish bronze material. When I created the file the surface is right with the green material covering the whole surface, but this recently when I open the file the surface material is broken with blue and sometimes black cracks. I wonder what’s wrong with this material. thx

i assume you ended up with 2 surfaces laying on top of each other. if not pls post your file here. or are you using some sort of displacement?