Which triangulation method or algorithm does arcscene use to create multipatch parts (patches) as you see in the attaching picture. The algorith decompose the polygon area into a set of triangles using vertices of the polygon object. But which method is it? It is not delanuay or ear clipping in my opinion but which one I can not figure it out any help??
This Esri whitepaper might get you started on the path to your answer: http://www.esri.com/library/whitepapers/pdfs/multipatch-geometry-type.pdf
Or if you want Delaunay triangulation, you can try out this tool: http://www.arcgis.com/home/item.html?id=6e9bc6cbf93d4939b2eb04ff8519be47