Fairly new Rhino user here, long time A’cad user. First time asking for help. Searched but didn’t find any existing relevant topic.
I have received some 3Mb .stl files. They are closed meshes of molds for RC plane prop.
I was asked to modify and output as a .igs file for CAM.
I made the modifications using Rhino Mesh tools. Then discovered that .igs doesn’t support meshes, needs to be surface (ie closed polysurface).
Converted to surface using Mesh2NURB, got the 20,000 faces warning and proceeded anyway.
No problems, surface seems fine - however Rhino file size, or IGES, has blown out to around 250Mb!
Are there any obvious things I can do to create a radically smaller closed polysurface file, closer to the 3Mb mesh I started with?
Am I doing something wrong? Can I simplify the surfaces without blowing away my curve detail?