I am looking for advice on creating surfaces with OpenSCAD. I have details of a number of surfaces that make up a solid. The surfaces are basically of two types * Planar with n points * BSplineSurface with U & V Details, U & V knot details etc. I would like to process the info and create an OpenSCAD Object using the information. Is there any example code or user library that I should be looking at? Thanks Keith