Excerpt from SofTutor's Teacher inside of AutoCAD 3D product. Topic 08.4 covers Trimming a 3D Surface. Master AutoCAD 3D in 8 hours buy full product (75 lessons ) for $99 at http://www.321learn.com/SofTutor_Vide...
can be configured to run inside of AutoCAD
Free download w example files at http://nvsi.com/AutoCAD