The IGES surface is not part of a volume, but I need to imprint this surface onto an aluminum mirror that I am designing. The surface is complex in nature and as far as I can tell there is no mechanism to reproduce it in Solidworks. They are surfaces output from Zemax, an optical design program.
I was hoping to use the imported B-rep surface to split a solid to put put the surface on the mirror. But, the "Cut with Surface" feature will not let me select it. Am I doing something wrong?