ACIS sometimes lose curvature or smoothness, and sometimes are not well exported or readed. dfx format, you'll notice the difference in file size.Īnother advantage of surface entities is that they don't have any problem when they're exported to other formats. If you have a ACIS model and export it to. So, I prefer, unless is strictly necessary, the surface entities, and plines, lines and circles with added thickness.ĪCIS geometry make BIIIIIIG files, and sometimes is is not necessary to use such entities. The advantage to use the surface entities, is file size. It has the disadvantage that the shape is extruded, but it is built without 'caps', so the top and the bottom of the 3d entity has to be built apart, with the surface commands too.
My experience in 3D is in Architectural Modelling. The extrude command creates a solid ACIS entity from a polyline or a region. When you create a profile drawing of a component on AutoCAD, there is one more feature that can help you get a better perspective on your creation.