1 | The major difference between IndexedFaceSet and IndexedLineSet is that VRML browser automatically connects the starting coordinate and ending coordinate of IndexedFaceSet to obtain a closed polyline and fills this area and shades it to make it look solid. |
2 |
IndexedFaceSet geometry node defines a set of such faces to create (the surface of) a general object of arbitrary shape and this node can be used in geometry field of a Shape node. Notice this is usual way in computer graphics of specifying objects
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