I am wondering how to define infinite elements? Assuming I have a regular defined 3D cube meshes using C3D8P. I like to change boundary meshes(C3D8P) to infinite elements. How do I do it? From the manual said, it is not supported by CAE and CAE only has acoustic infinite elements. Any step by step example? And do we have an infinite element type for pore pressure element of C3D8P? Thanks so much.