Extract internal surfaces from combined stl format
Hello! I need to analyse cavities of combined stl (two spheres with less sizes are included, sphere_2included.stl). Could you suggest some methods to extract internal surfaces and save them in another stl by using gmsh? I know, that boolean operations (openCASCADE) with stl aren't applied. May I do this by removing external entities? If I can, give me some example, please. Best regards, Nick. sphere_2included.stl