3D extrusion algorithm can be used for meshing prisms, i.e. <b>3D Shapes</b>
defined by two opposing faces having the same number of vertices and
-edges and meshed using the \ref projection_algos_page "2D Projection"
-algorithm. These two faces should be connected by quadrangle "side"
-faces.
+edges and meshed using, for example, the \ref projection_algos_page
+"2D Projection" algorithm. These two faces should be connected by
+quadrangle "side" faces.
The opposing faces can be meshed with either quadrangles or triangles,
while the side faces should be meshed with quadrangles only.
have in the same 3D mesh such elements as hexahedrons, prisms and
polyhedrons.
-*/
\ No newline at end of file
+\note This algorithm works correctly only if the opposing faces have
+the same (or similar) meshing topography. Otherwise, 3D extrusion
+algorithm can fail to build mesh volumes.
+
+*/
